├── DomainList.txt ├── .gitignore ├── .github └── ISSUE_TEMPLATE │ ├── feature_request.md │ └── bug_report.md ├── README.md ├── Get-Domain-MailInfo.ps1 └── LICENSE /DomainList.txt: -------------------------------------------------------------------------------- 1 | example.com 2 | -example.com 3 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | DomainResults.csv 2 | .vscode/launch.json 3 | -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/feature_request.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Feature request 3 | about: Suggest an idea for this project 4 | title: '' 5 | labels: '' 6 | assignees: '' 7 | 8 | --- 9 | 10 | **Is your feature request related to a problem? Please describe.** 11 | A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] 12 | 13 | **Describe the solution you'd like** 14 | A clear and concise description of what you want to happen. 15 | 16 | **Describe alternatives you've considered** 17 | A clear and concise description of any alternative solutions or features you've considered. 18 | 19 | **Additional context** 20 | Add any other context or screenshots about the feature request here. 21 | -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/bug_report.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Bug report 3 | about: Create a report to help us improve 4 | title: '' 5 | labels: '' 6 | assignees: '' 7 | 8 | --- 9 | 10 | **Describe the bug** 11 | A clear and concise description of what the bug is. 12 | 13 | **To Reproduce** 14 | Steps to reproduce the behavior: 15 | 1. Go to '...' 16 | 2. Click on '....' 17 | 3. Scroll down to '....' 18 | 4. See error 19 | 20 | **Expected behavior** 21 | A clear and concise description of what you expected to happen. 22 | 23 | **Screenshots** 24 | If applicable, add screenshots to help explain your problem. 25 | 26 | **Desktop (please complete the following information):** 27 | - OS: [e.g. iOS] 28 | - Browser [e.g. chrome, safari] 29 | - Version [e.g. 22] 30 | 31 | **Smartphone (please complete the following information):** 32 | - Device: [e.g. iPhone6] 33 | - OS: [e.g. iOS8.1] 34 | - Browser [e.g. stock browser, safari] 35 | - Version [e.g. 22] 36 | 37 | **Additional context** 38 | Add any other context about the problem here. 39 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # PSGet-Domain-MailInfo 2 | PowerShell script to get domain mail info such as MX, SPF, DKIM, DMARC and StartTLS. 3 | 4 | Output is accessible in PowerShell pipeline. 5 | Results are also written to DomainResults.CSV file and optionally to pie-chart PNGs by adding -CreateGraphs 1. 6 | 7 | Three example uses for one / a limited number of domain(s): 8 | ``` 9 | PS C:\>.\Get-Domain-MailInfo example.com 10 | PS C:\>.\Get-Domain-MailInfo example.com, github.com 11 | PS C:\>.\Get-Domain-MailInfo example.com, github.com -CreateGraphs 1 -CheckDKIM 1 -DKIMSelector google 12 | ``` 13 | Example where a variable is assigned the data that is returned when checking domains listed in a txt file: 14 | ``` 15 | $mydomains = .\Get-Domain-MailInfo -Path .\MyDomains.txt -CheckDKIM 1 -DKIMSelector google -PolicyChecks Microsoft,Google 16 | ``` 17 | (progress bar will be shown - enumerating each domain as it is checked) 18 | The array $mydomains now holds the result for all requested domain names. 19 | 20 | List the domainnames that have SPF: 21 | ``` 22 | $mydomains | Where-Object -FilterScript { $_.HasSPF -eq $true } | Select-Object $_ -ExpandProperty Domain 23 | ``` 24 | 25 | Print information for one domain: 26 | ``` 27 | $mydomains[nn] | Format-Table 28 | ``` 29 | or named 30 | ``` 31 | $mydomains.where{ $_.Domain -eq "example.com" } 32 | 33 | Domain : example.com 34 | HasMX : True 35 | HasSPF : True 36 | HasDKIM : True 37 | HasDMARC : True 38 | HasStartTLS : #N/A 39 | MXRecord : Null MX (RFC7505) 40 | SPFRecord : v=spf1 -all 41 | DKIMSelector : google 42 | DKIMRecord : [google]v=DKIM1; p= 43 | DMARCRecord : v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s 44 | DMARCPolicy : p=reject 45 | PolicyChecks : [Microsoft]Qualified(SPFTrue;DKIMTrue;DMARCTrue;DMARCStrictTrue);[Google]Qualified(SPFTrue;DKIMTrue;DMARCTrue) 46 | 47 | ``` 48 | 49 | More information and examples can be found using Get-Help, see output below: 50 | 51 | ``` 52 | PS C:\> Get-Help .\Get-Domain-MailInfo.ps1 -Full 53 | 54 | NAME 55 | C:\PSGet-Domain-MailInfo\Get-Domain-MailInfo.ps1 56 | 57 | SYNOPSIS 58 | Get MailInfo for domain(s). 59 | 60 | Default is to retrieve MX, SPF and DMARC records. 61 | * Will recognize Null MX - RFC7505 62 | 63 | Optionally add -CheckDKIM 1 to retrieve DKIM record(s). 64 | * Note requirement to provide DKIMSelector parameter. 65 | This parameter is a text array - provide selectors separated by comma 66 | 67 | Will fall back to using -DKIMSelector Selector1, Selector2 (Microsoft Exchange Online) 68 | 69 | Returns two columns 70 | - DKIMSelector holding all Selectors tested, separated by / 71 | - DKIMRecord holding [Selector1]DKIMRecord1/[Selector2]DKIMRecord2 72 | 73 | Example below is typically seen when DNS has wildcard TXT/SOA record: 74 | "Selector1/Selector2";"[Selector1]NoDKIMRecord/[Selector2]NoDKIMRecord" 75 | 76 | - Outputs to DomainResults.csv and console. 77 | - Uses System Default List Separator Character and Quotes to simplify CSV processing. 78 | 79 | 80 | SYNTAX 81 | .\Get-Domain-MailInfo.ps1 [-Name ] [-CheckSPF ] [-CheckDMARC ] [-CheckDKIM ] 82 | [-DKIMSelector ] [-DNSServer ] [-ForceDNSServer ] [-CheckStartTLS ] 83 | [-Overwrite ] [-UseHeader ] [-CreateGraphs ] [-PolicyChecks ] [] 84 | 85 | .\Get-Domain-MailInfo.ps1 [[-Name] ] [-Path ] [-CheckSPF ] [-CheckDMARC ] 86 | [-CheckDKIM ] [-DKIMSelector ] [-DNSServer ] [-ForceDNSServer ] 87 | [-CheckStartTLS ] [-Overwrite ] [-UseHeader ] [-CreateGraphs ] 88 | [-PolicyChecks ] [] 89 | 90 | 91 | DESCRIPTION 92 | 93 | 94 | PARAMETERS 95 | -Name 96 | Script execution option 1 is to check ONE domain 97 | 98 | Required? false 99 | Position? 1 100 | Default value example.com 101 | Accept pipeline input? false 102 | Aliases 103 | Accept wildcard characters? false 104 | 105 | -Path 106 | Script execution option 2 is to check a list of domains from a file, one domain per line 107 | 108 | Required? false 109 | Position? named 110 | Default value 111 | Accept pipeline input? false 112 | Aliases 113 | Accept wildcard characters? false 114 | 115 | -CheckSPF 116 | Default is to check SPF (RFC7208) 117 | 118 | Required? false 119 | Position? named 120 | Default value True 121 | Accept pipeline input? false 122 | Aliases 123 | Accept wildcard characters? false 124 | 125 | -CheckDMARC 126 | Default is to check DMARC (RFC7489) 127 | 128 | Required? false 129 | Position? named 130 | Default value True 131 | Accept pipeline input? false 132 | Aliases 133 | Accept wildcard characters? false 134 | 135 | -CheckDKIM 136 | Default is NOT to check DKIM (RFC6376) 137 | If you add -CheckDKIM 1 you should also specify -DKIMSelector 138 | 139 | Required? false 140 | Position? named 141 | Default value False 142 | Accept pipeline input? false 143 | Aliases 144 | Accept wildcard characters? false 145 | 146 | -DKIMSelector 147 | Specify the DKIMSelector(s) to check separated by comma. 148 | Tip: Send an e-mail to external mailbox for each system to check Selector for. 149 | Note: The script defaults to -DKIMSelector Selector1, Selector2 150 | This is the default used by Microsoft Exchange online. 151 | You could try -DKIMSelector google for G-Suite 152 | 153 | Required? false 154 | Position? named 155 | Default value @("Selector1", "Selector2") 156 | Accept pipeline input? false 157 | Aliases 158 | Accept wildcard characters? false 159 | 160 | -DNSServer 161 | Default is to use system default DNS Server 162 | 163 | Required? false 164 | Position? named 165 | Default value 166 | Accept pipeline input? false 167 | Aliases 168 | Accept wildcard characters? false 169 | 170 | -ForceDNSServer 171 | Default is to check if DNS server is working 172 | 173 | Required? false 174 | Position? named 175 | Default value False 176 | Accept pipeline input? false 177 | Aliases 178 | Accept wildcard characters? false 179 | 180 | -CheckStartTLS 181 | Default is to check StartTLS (RFC3207) 182 | 183 | Required? false 184 | Position? named 185 | Default value True 186 | Accept pipeline input? false 187 | Aliases 188 | Accept wildcard characters? false 189 | 190 | -Overwrite 191 | Default is to overwrite the .CSV file. 192 | Note: The script will check for file lock and softfail. 193 | Remember to close the CSV file before running the script again. 194 | 195 | Required? false 196 | Position? named 197 | Default value True 198 | Accept pipeline input? false 199 | Aliases 200 | Accept wildcard characters? false 201 | 202 | -UseHeader 203 | The UseHeader line preference follows Overwrite unless specified 204 | 205 | Required? false 206 | Position? named 207 | Default value $Overwrite 208 | Accept pipeline input? false 209 | Aliases 210 | Accept wildcard characters? false 211 | 212 | -CreateGraphs 213 | The CreateGraph option is set to False by default as it is just a nice-to-have. 214 | Will create one .PNG pie-chart per protection type; HasSPF/HasDKIM/HasDMARC. 215 | 216 | Required? false 217 | Position? named 218 | Default value False 219 | Accept pipeline input? false 220 | Aliases 221 | Accept wildcard characters? false 222 | 223 | -PolicyChecks 224 | Policy Check tool was created to help validate if the email polices for 225 | a domain pass the requirements of named service providers. E.g. Microsoft. 226 | Specify the Policy Checks to perform separated by comma. 227 | 228 | Required? false 229 | Position? named 230 | Default value 231 | Accept pipeline input? false 232 | Aliases 233 | Accept wildcard characters? false 234 | 235 | 236 | This cmdlet supports the common parameters: Verbose, Debug, 237 | ErrorAction, ErrorVariable, WarningAction, WarningVariable, 238 | OutBuffer, PipelineVariable, and OutVariable. For more information, see 239 | about_CommonParameters (https://go.microsoft.com/fwlink/?LinkID=113216). 240 | 241 | INPUTS 242 | 243 | OUTPUTS 244 | 245 | -------------------------- EXAMPLE 1 -------------------------- 246 | 247 | PS > .\Get-Domain-MailInfo 248 | Domain : example.com 249 | HasMX : True 250 | HasSPF : True 251 | HasDKIM : #N/A 252 | HasDMARC : False 253 | HasStartTLS : #N/A 254 | MXRecord : Null MX (RFC7505) 255 | SPFRecord : v=spf1 -all 256 | DKIMSelector : #N/A 257 | DKIMRecord : #N/A 258 | DMARCRecord : False 259 | DMARCPolicy : none 260 | PolicyChecks : #N/A 261 | 262 | -------------------------- EXAMPLE 2 -------------------------- 263 | 264 | PS > .\Get-Domain-MailInfo.ps1 -CheckDKIM 1 | Format-Table -AutoSize 265 | Domain HasMX HasSPF HasDKIM HasDMARC HasStartTLS MXRecord SPFRecord DKIMSelector DKIMRecord DMARCPolicy PolicyChecks 266 | ------ ----- ------ ------- -------- ----------- -------- --------- ------------ ---------- ----------- ------------ 267 | example.com True True False False #N/A Null MX (RFC7505) v=spf1 -all Selector1/Selector2 False #N/A #N/A 268 | 269 | -------------------------- EXAMPLE 3 -------------------------- 270 | 271 | PS > .\Get-Domain-MailInfo.ps1 github.com -CheckDKIM 1 -DKIMSelector google -PolicyChecks Microsoft 272 | [Notice: ] Could not connect to the SMTP Server alt1.aspmx.l.google.com 273 | 274 | Domain : github.com 275 | HasMX : True 276 | HasSPF : True 277 | HasDKIM : True 278 | HasDMARC : True 279 | HasStartTLS : False 280 | MXRecord : aspmx.l.google.com,alt4.aspmx.l.google.com,alt3.aspmx.l.google.com,alt2.aspmx.l.google.com,alt1.aspmx.l. 281 | google.com 282 | SPFRecord : v=spf1 ip4:192.30.252.0/22 include:_netblocks.google.com include:_netblocks2.google.com include:_netbloc 283 | ks3.google.com include:spf.protection.outlook.com include:mail.zendesk.com include:_spf.salesforce.com i 284 | nclude:servers.mcsv.net include:mktomail.com ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ip4:1 285 | 67.89.101.2 ip4:167.89.101.192/28 ip4:192.254.112.60 ip4:192.254.112.98/31 ip4:192.254.113.10 ip4:192.25 286 | 4.113.101 ip4:192.254.114.176 ip4:62.253.227.114 ~all 287 | DKIMSelector : google 288 | DKIMRecord : [google]v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAj6T5sl/RwdSqGoYWaWaFbS2UAeyPrEmd0g 289 | ogocmRfS441qwR8/0KB81Hw89P0l4YiFRrXYk7NVIGfyCRHAYYZUzCkGeOysI2EjgzLFhd/NEsbRzOEc/kWkK/RO6JFq/5lOn6M9AZw/ 290 | ap9tds4JG9ApgNNdSpPxp9DmvpsOSgNMVflRxQFrk3kdS4RNAPKu/OP 291 | DMARCRecord : v=DMARC1; p=reject; pct=100; rua=mailto:dmarc@github.com 292 | DMARCPolicy : p=reject 293 | PolicyChecks : [Microsoft]Unqualified(SPFTrue;DKIMTrue;DMARCTrue;DMARCStrictFalse);[Google]Qualified(SPFTrue;DKIMTrue;DMARCTrue) 294 | 295 | -------------------------- EXAMPLE 4 -------------------------- 296 | 297 | PS > .\Get-Domain-MailInfo.ps1 -Name "-invalid.name" -verbose | FT 298 | VERBOSE: Script Get-Domain-MailInfo.ps1 299 | VERBOSE: Last Updated 2025-05-09 300 | VERBOSE: 301 | VERBOSE: Checking 1 domain(s) 302 | VERBOSE: [INVALID:] Domain lookup failed - probable invalid domain name (-invalid.name) 303 | 304 | Domain HasMX HasSPF HasDKIM HasDMARC HasStartTLS MXRecord SPFRecord DKIMSelector DKIMRecord DMARCPolicy PolicyChecks 305 | ------ ----- ------ ------- -------- ----------- -------- --------- ------------ ---------- ----------- ------------ 306 | -invalid.name #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A none #N/A 307 | 308 | -------------------------- EXAMPLE 5 -------------------------- 309 | 310 | PS > .\Get-Domain-MailInfo.ps1 -Path .\DomainList.txt | FT 311 | Domain HasMX HasSPF HasDKIM HasDMARC HasStartTLS MXRecord SPFRecord DKIMSelector DKIMRecord DMARCPolicy PolicyChecks 312 | ------ ----- ------ ------- -------- ----------- -------- --------- ------------ ---------- ----------- ------------ 313 | example.com True True #N/A False #N/A Null MX (RFC7505) v=spf1 -all #N/A #N/A p=reject #N/A 314 | -example.com #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 315 | 316 | RELATED LINKS 317 | https://github.com/dotBATmanNO/PSGet-Domain-MailInfo/ 318 | -------------------------------------------------------------------------------- /Get-Domain-MailInfo.ps1: -------------------------------------------------------------------------------- 1 | <# 2 | .SYNOPSIS 3 | Get MailInfo for domain(s). 4 | 5 | Default is to retrieve MX, SPF and DMARC records. 6 | * Will recognize Null MX - RFC7505 7 | 8 | Optionally add -CheckDKIM 1 to retrieve DKIM record(s). 9 | * Note requirement to provide DKIMSelector parameter. 10 | This parameter is a text array - provide selectors separated by comma 11 | 12 | Will fall back to using -DKIMSelector Selector1, Selector2 (Microsoft Exchange Online) 13 | 14 | Returns two columns 15 | - DKIMSelector holding all Selectors tested, separated by / 16 | - DKIMRecord holding [Selector1]DKIMRecord1/[Selector2]DKIMRecord2 17 | 18 | Example below is typically seen when DNS has wildcard TXT/SOA record: 19 | "Selector1/Selector2";"[Selector1]NoDKIMRecord/[Selector2]NoDKIMRecord" 20 | 21 | - Outputs to DomainResults.csv and console. 22 | - Uses System Default List Separator Character and Quotes to simplify CSV processing. 23 | .LINK 24 | https://github.com/dotBATmanNO/PSGet-Domain-MailInfo/ 25 | .EXAMPLE 26 | .\Get-Domain-MailInfo 27 | Domain : example.com 28 | HasMX : True 29 | HasSPF : True 30 | HasDKIM : #N/A 31 | HasDMARC : False 32 | HasStartTLS : #N/A 33 | MXRecord : Null MX (RFC7505) 34 | SPFRecord : v=spf1 -all 35 | DKIMSelector : #N/A 36 | DKIMRecord : #N/A 37 | DMARCRecord : False 38 | DMARCPolicy : none 39 | PolicyChecks : #N/A 40 | .EXAMPLE 41 | .\Get-Domain-MailInfo.ps1 -CheckDKIM 1 | Format-Table -AutoSize 42 | Domain HasMX HasSPF HasDKIM HasDMARC HasStartTLS MXRecord SPFRecord DKIMSelector DKIMRecord DMARCPolicy PolicyChecks 43 | ------ ----- ------ ------- -------- ----------- -------- --------- ------------ ---------- ----------- ------------ 44 | example.com True True False False #N/A Null MX (RFC7505) v=spf1 -all Selector1/Selector2 False #N/A #N/A 45 | .EXAMPLE 46 | .\Get-Domain-MailInfo.ps1 github.com -CheckDKIM 1 -DKIMSelector google -PolicyChecks Microsoft, 47 | [Notice: ] Could not connect to the SMTP Server alt3.aspmx.l.google.com 48 | 49 | Domain : github.com 50 | HasMX : True 51 | HasSPF : True 52 | HasDKIM : True 53 | HasDMARC : True 54 | HasStartTLS : False 55 | MXRecord : aspmx.l.google.com,alt2.aspmx.l.google.com,alt1.aspmx.l.google.com,alt4.aspmx.l.google.com,alt3.aspmx.l.google.com 56 | SPFRecord : v=spf1 ip4:192.30.252.0/22 include:_netblocks.google.com include:_netblocks2.google.com include:_netblocks3.google.com 57 | include:spf.protection.outlook.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net 58 | include:mktomail.com ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ip4:167.89.101.2 ip4:167.89.101.192/28 59 | ip4:192.254.112.60 ip4:192.254.112.98/31 ip4:192.254.113.10 ip4:192.254.113.101 ip4:192.254.114.176 60 | ip4:62.253.227.114 ~all 61 | DKIMSelector : google 62 | DKIMRecord : [google]v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAj6T5sl/ 63 | RwdSqGoYWaWaFbS2UAeyPrEmd0gogocmRfS441qwR8/0KB81Hw89P0l4YiFRrXYk7NVIGfyCRHAYYZUzCkGeOysI2EjgzLFhd/NEsbRzOEc/ 64 | kWkK/RO6JFq/5lOn6M9AZw/ap9tds4JG9ApgNNdSpPxp9DmvpsOSgNMVflRxQFrk3kdS4RNAPKu/ 65 | DMARCRecord : v=DMARC1; p=reject; pct=100; rua=mailto:dmarc@github.com 66 | DMARCPolicy : p=reject 67 | PolicyChecks : [Microsoft]Unqualified(SPFTrue;DKIMTrue;DMARCTrue;DMARCStrictFalse);[Google]Qualified(SPFTrue;DKIMTrue;DMARCTrue) 68 | 69 | .EXAMPLE 70 | .\Get-Domain-MailInfo.ps1 -Name "-invalid.name" -verbose | FT 71 | VERBOSE: Script Get-Domain-MailInfo.ps1 72 | VERBOSE: Last Updated 20250518-18May2025 73 | VERBOSE: 74 | VERBOSE: Checking 1 domain(s) 75 | VERBOSE: [INVALID:] Domain lookup failed - probable invalid domain name (-invalid.name) 76 | 77 | Domain HasMX HasSPF HasDKIM HasDMARC HasStartTLS MXRecord SPFRecord DKIMSelector DKIMRecord DMARCPolicy PolicyChecks 78 | ------ ----- ------ ------- -------- ----------- -------- --------- ------------ ---------- ----------- ------------ 79 | -invalid.name #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A none #N/A 80 | 81 | .EXAMPLE 82 | .\Get-Domain-MailInfo.ps1 -Path .\DomainList.txt | FT 83 | Domain HasMX HasSPF HasDKIM HasDMARC HasStartTLS MXRecord SPFRecord DKIMSelector DKIMRecord DMARCPolicy PolicyChecks 84 | ------ ----- ------ ------- -------- ----------- -------- --------- ------------ ---------- ----------- ------------ 85 | example.com True True #N/A False #N/A Null MX (RFC7505) v=spf1 -all #N/A #N/A p=reject #N/A 86 | -example.com #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 87 | #> 88 | [CmdletBinding( 89 | PositionalBinding=$false,DefaultParameterSetName="Name")] 90 | param ( 91 | # Script execution option 1 is to check ONE domain 92 | [Parameter(ParameterSetName="Name")] 93 | [Parameter(Position=0)][string[]]$Name = "example.com", 94 | # Script execution option 2 is to check a list of domains from a file, one domain per line 95 | [Parameter(ParameterSetName="Path")] 96 | [string]$Path, 97 | # Default is to check SPF (RFC7208) 98 | [bool]$CheckSPF=$true, 99 | # Default is to check DMARC (RFC7489) 100 | [bool]$CheckDMARC=$true, 101 | # Default is NOT to check DKIM (RFC6376) 102 | # If you add -CheckDKIM 1 you should also specify -DKIMSelector 103 | [bool]$CheckDKIM=$false, 104 | # Specify the DKIMSelector(s) to check separated by comma. 105 | # Tip: Send an e-mail to external mailbox for each system to check Selector for. 106 | # Note: The script defaults to -DKIMSelector Selector1, Selector2 107 | # This is the default used by Microsoft Exchange online. 108 | # You could try -DKIMSelector google for G-Suite 109 | [string[]]$DKIMSelector=@("Selector1", "Selector2"), 110 | # Default is to use system default DNS Server 111 | [string]$DNSServer, 112 | # Default is to check if DNS server is working 113 | [bool]$ForceDNSServer=$false, 114 | # Default is to check StartTLS (RFC3207) 115 | [bool]$CheckStartTLS=$true, 116 | # Default is to overwrite the .CSV file. 117 | # Note: The script will check for file lock and softfail. 118 | # Remember to close the CSV file before running the script again. 119 | [bool]$Overwrite=$true, 120 | # The UseHeader line preference follows Overwrite unless specified 121 | [bool]$UseHeader=$Overwrite, 122 | # The CreateGraph option is set to False by default as it is just a nice-to-have. 123 | # Will create one .PNG pie-chart per protection type; HasSPF/HasDKIM/HasDMARC. 124 | [bool]$CreateGraphs=$False, 125 | # Policy Check tool was created to help validate if the email polices for 126 | # a domain pass the requirements of named service providers. E.g. Microsoft.) 127 | # Specify the Policy Checks to perform separated by comma. 128 | [string[]]$PolicyChecks) 129 | 130 | $global:DNSServerToUse = @() 131 | 132 | Function fnIsDomain { 133 | 134 | param ([string]$domname) 135 | Try 136 | { 137 | 138 | $DNSRecord = Resolve-DnsName -Name $domname -DnsOnly -Server $DNSServerToUse -ErrorAction Stop 2> $null 139 | } 140 | Catch 141 | { 142 | $DNSRecord = $False 143 | } 144 | If ($DNSRecord) 145 | { 146 | Return $true 147 | } 148 | else 149 | { 150 | # DNS lookup failed - Match $domainname to RegEx - note not supporting punycode 151 | # Source https://stackoverflow.com/questions/11809631/ 152 | If ($domname -notmatch "(?=^.{4,253}$)(^((?!-)[a-zA-Z0-9-]{1,63}(? $null 167 | } 168 | Catch 169 | { 170 | Return $False 171 | } 172 | 173 | If ( $MXRecord.NameExchange ) 174 | { 175 | $MXRec = $MXRecord.NameExchange 176 | 177 | # Return multiple MX records as comma separated list. 178 | If ( $MXRec -is [Array]) { $MXRec = $MXRec -join "," } 179 | If ( $MXRec -eq "." ) 180 | { 181 | # . (dot) as MX record indicates Null MX 182 | If ($MXRecord.Preference -eq 0) 183 | { 184 | # With a preference of 0 this is a valid NullMX record 185 | $MXRec = "Null MX (RFC7505)" 186 | } 187 | else 188 | { 189 | $MXRec = "[Invalid:] Null MX (RFC7505) should have Preference=0, was $($MXRecord.Preference)." 190 | } 191 | } 192 | Return $MXRec 193 | } 194 | Else 195 | { 196 | Return $False 197 | } 198 | } # End Function fnMXRecord 199 | 200 | Function fnSPFRecord { 201 | 202 | param ([string]$DomName) 203 | Try 204 | { 205 | $SPFRecord = Resolve-DnsName -Name $domname -Type TXT -DnsOnly -Server $DNSServerToUse -ErrorAction Stop 2> $null 206 | } 207 | Catch 208 | { 209 | Return $False 210 | } 211 | $spfrec = ($spfrecord | Where-Object {$_.strings -like 'v=spf1*'}).text 212 | 213 | If ($SPFRec) { Return $SPFRec -join '' } 214 | 215 | # No v=SPF1 txt record was found, signal with $false 216 | Return $False 217 | 218 | } # End Function fnSPFRecord 219 | 220 | Function fnDKIMRecord { 221 | 222 | param ([string]$domname, [string[]]$selector) 223 | 224 | # Check for existence of _domainkey 225 | # This is an easy but not guaranteed way to tell if any Selector(s) exist. 226 | Try 227 | { 228 | $strDKIMRecord = Resolve-DnsName -Name "_domainkey.$($domname)" -DnsOnly -Server $DNSServerToUse -ErrorAction Stop 2> $null 229 | } 230 | Catch 231 | { 232 | # Script currently fails the DKIM check if _domainkey does not exist. 233 | # Consider if this is always true, e.g. different DNS server implementations. 234 | Return $False 235 | } 236 | 237 | If ($selector -eq "") 238 | { 239 | $selector = Read-Host "Input Selector to use for $domname" 240 | } 241 | 242 | $strDKIMRecords = "" 243 | ForEach ($DKIMSel in $Selector) 244 | { 245 | # Build DKIM record selector._domainkey.domainname 246 | $strDKIMrec = "$($DKIMSel)._domainkey.$($domname)" 247 | $strDKIMRecord = "" 248 | 249 | Try 250 | { 251 | $strDKIMRecord = Resolve-DnsName -Name $strDKIMrec -Type TXT -DnsOnly -Server $DNSServerToUse -ErrorAction Stop 2> $null 252 | } 253 | Catch 254 | { 255 | $strDKIMRecord = "NoDKIMRecord" 256 | } 257 | If ($strDKIMRecord.Strings) 258 | { 259 | $strDKIMRecord = $strDKIMRecord.Strings | Where-Object -FilterScript { $_ -like "v=DKIM1*" } 260 | If ($null -eq $strDKIMRecord) 261 | { 262 | Write-Verbose "[INVALID:] TXT record for selector $($DKIMSel) does not start with v=DKIM1" 263 | $strDKIMRecord = "[INVALID:]$($strDKIMRecord)" 264 | } 265 | } 266 | else 267 | { 268 | $strDKIMRecord = "NoDKIMRecord" 269 | } 270 | $strDKIMRecords = "$($strDKIMRecords)/[$($DKIMSel)]$($strDKIMRecord)" 271 | 272 | } 273 | Return $strDKIMRecords.Substring(1) 274 | } # End Function fnDKIMRecord 275 | 276 | Function fnDMARCRecord { 277 | 278 | param ([string]$domname) 279 | 280 | Try 281 | { 282 | $DMARCRecord = Resolve-DnsName -Name _dmarc.$domname -Type TXT -DnsOnly -Server $DNSServerToUse -ErrorAction Stop 2> $null 283 | } 284 | Catch 285 | { 286 | Return $False 287 | } 288 | 289 | If ($DMARCRecord.Strings) 290 | { 291 | $DMARCRec = $DMARCRecord | Select-Object -ExpandProperty Strings 292 | 293 | # Check validity of DMARC record 294 | If ($DMARCRec -like "v=DMARC1*") 295 | { 296 | Return $DMARCRec 297 | } 298 | else 299 | { 300 | Write-Verbose "[INVALID:] DMARC record does not start with v=DMARC1" 301 | Return "[Invalid:]$($DMARCRec)" 302 | } 303 | } 304 | Else 305 | { 306 | # _dmarc DNS entry exists but is not a TXT record - invalid? 307 | Return $False 308 | } 309 | } # End Function fnDMARCrecord 310 | 311 | 312 | Function fnCheckSTARTTLS { 313 | param ([string]$mxHost) 314 | 315 | Try { 316 | #Create connection 317 | $conn = new-object System.Net.Sockets.TcpClient 318 | $connect = $conn.BeginConnect($mxHost,25,$null,$null) 319 | #Set up a timeout 320 | $wait = $connect.AsyncWaitHandle.WaitOne(3000,$false) 321 | If(-Not $Wait) { 322 | Write-Verbose "Connection to $mxHost on port 25 timed out" 323 | throw "Timeout" 324 | } 325 | #Error out if the server refuses our connection attempt 326 | If(!$conn.Connected) { 327 | Write-Verbose "Connection to $mxHost on port 25 unsuccessful" 328 | throw "Connection to $mxHost on port 25 unsuccessful" 329 | } 330 | } Catch { 331 | Write-Host "[Notice: ] Could not connect to the SMTP Server $mxHost" -ForegroundColor Red 332 | Return $False 333 | } 334 | Try { 335 | $stream = $conn.GetStream() 336 | 337 | $reader = new-object System.IO.StreamReader($stream) 338 | $writer = new-object System.IO.StreamWriter($stream) 339 | 340 | $stream.ReadTimeout = 5000 341 | $writer.AutoFlush = $true 342 | 343 | $connResp = $reader.ReadLine() 344 | if(!$connResp.StartsWith("220")) { 345 | Write-Verbose $connResp 346 | Return $False 347 | } 348 | 349 | $reader.DiscardBufferedData() #Clear reader 350 | $writer.WriteLine("EHLO mail") 351 | $ehloResp = $reader.ReadLine() 352 | if (!$ehloResp.StartsWith("250")) { 353 | Write-Verbose "Invalid EHLO response" 354 | Return $False 355 | } 356 | 357 | $reader.DiscardBufferedData() #Clear reader 358 | $writer.WriteLine("STARTTLS") 359 | $startTLSResp = $reader.ReadLine() 360 | if (!$startTLSResp.StartsWith("220")) { 361 | Write-Verbose "Invalid STARTTLS response" 362 | Return $False 363 | } 364 | Return $True 365 | 366 | } Catch { 367 | Write-Verbose $_ 368 | Return $False 369 | } 370 | } # End Function fnCheckSTARTTLS 371 | 372 | Function fnCheckCSVFileLock { 373 | param ([string]$CSVFileName, [bool]$CreateFile) 374 | 375 | # Check if file exists 376 | If (Test-Path -Path $CSVFileName -PathType Leaf) 377 | { 378 | # File Exists, can we write to it? 379 | Try 380 | { 381 | $FileStream = [System.IO.File]::Open($CSVFileName,'Open','Write') 382 | } 383 | Catch 384 | { 385 | # File Write failed - must be locked 386 | Write-Verbose ".. the script will not be able to output results to .CSV file" 387 | Write-Verbose " (Is the file still open in Excel or other program?)" 388 | Return $true 389 | } 390 | 391 | # File is not locked - Let's close it to leave it available 392 | $FileStream.Close() 393 | $FileStream.Dispose() 394 | 395 | # If we are not asked to create a blank file we are ready to return 396 | If (-Not $CreateFile) { Return $false } 397 | } 398 | 399 | New-Item -Path $CSVFileName -ItemType File -Force -InformationAction Ignore | Out-Null 400 | Return $false 401 | 402 | } 403 | 404 | Function fnBuildGraph { 405 | 406 | param ([string]$PNGFileName, [string]$ProtectionType, $ProtectionData) 407 | 408 | #Let's set the colors correctly 409 | $arrColors = @() 410 | ForEach ($key in $ProtectionData.Keys) 411 | { 412 | If ($key -like "True*" ) { $arrColors += [System.Drawing.Color]::Green } 413 | If ($key -like "False*") { $arrColors += [System.Drawing.Color]::Red } 414 | If ($key -like "#N/A*" ) { $arrColors += [System.Drawing.Color]::Orange } 415 | } 416 | 417 | [void][Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms.DataVisualization") 418 | 419 | #frame 420 | $HasProtectionChart = New-object System.Windows.Forms.DataVisualization.Charting.Chart 421 | $HasProtectionChart.Width = 800 422 | $HasProtectionChart.Height = 400 423 | $HasProtectionChart.BackColor = [System.Drawing.Color]::White 424 | $HasProtectionChart.Palette = [System.Windows.Forms.DataVisualization.Charting.ChartColorPalette]::None 425 | $HasProtectionChart.PaletteCustomColors = $arrColors 426 | 427 | #header 428 | [void]$HasProtectionChart.Titles.Add("E-mail Protection: $($ProtectionType)") 429 | 430 | $HasProtectionChart.Titles[0].Font = "segoeuilight,20pt" 431 | 432 | $HasProtectionChart.Titles[0].Alignment = "topLeft" 433 | 434 | $chartarea = New-Object System.Windows.Forms.DataVisualization.Charting.ChartArea 435 | 436 | $chartarea.Name = "$($ProtectionType)Area" 437 | 438 | $HasProtectionChart.ChartAreas.Add($chartarea) 439 | 440 | [void]$HasProtectionChart.Series.Add("ProtectionData") 441 | 442 | $HasProtectionChart.Series["ProtectionData"].ChartType = [System.Windows.Forms.DataVisualization.Charting.SeriesChartType]::Pie 443 | 444 | $HasProtectionChart.Series["ProtectionData"].Points.DataBindXY($ProtectionData.Keys, $ProtectionData.Values) 445 | 446 | $HasProtectionChart.SaveImage($PNGFileName,"png") 447 | 448 | } # End fnBuildGraph 449 | 450 | # Initialize Script 451 | # First step is to define script settings 452 | $ScriptPath = Split-Path -parent $PSCommandPath # Use the folder the script was started from 453 | $charListSep = (Get-Culture).TextInfo.ListSeparator # Get the local system list separator 454 | $csvFile = "$ScriptPath\DomainResults.csv" # Place the DomainResults.csv in script folder 455 | $pngFile = "$ScriptPath\DomainResults" # Place the DomainResults_ProtectionType.png images in script folder 456 | $bolCSV = $true # Bolean value used to detect If CSV file is locked 457 | If ($CheckDKIM -eq $False) { $DKIMSelector = "#N/A"} # If DKIM is not checked we do not need a selector 458 | 459 | If ($DNSServer) # Using specific DNS server for queries 460 | { 461 | If (-Not($ForceDNSServer)) # Should we check if DNS server is able to resolve root DNS server? 462 | { 463 | Try 464 | { 465 | $DNSRecord = Resolve-DnsName -Name "a.root-servers.net" -DnsOnly -Server $DNSServer -ErrorAction Stop 2> $null 466 | } 467 | Catch 468 | { 469 | # DNS Server was not found 470 | Write-Host "Server $DNSServer is not able to resolve a.root-servers.net - is this DNS server working?" 471 | Write-Host "Note: Override this check with -ForceDNSServer 1" 472 | Break 473 | } 474 | } 475 | $DNSServerToUse = @($DNSServer) 476 | } 477 | else 478 | { 479 | $DNSServerToUse = @() # Use System Default DNS Server 480 | } 481 | 482 | # Header line using quotes and system default list separator character 483 | $arrheader = """Domain", "HasMX", "HasSPF", "HasDKIM", "HasDMARC", "HasStartTLS", 484 | "MXRecord", "SPFRecord", "DKIMSelector", "DKIMRecord", "DMARCRecord", "DMARCPolicy", "PolicyChecks""" 485 | $headerline = $arrheader -join """$($charlistsep)""" 486 | 487 | # Use array, even If only one domain has been provided 488 | If ($Path) 489 | { $arrDomains = Get-Content $Path 2> $null } 490 | else 491 | { $arrDomains = $Name } 492 | 493 | If ($arrDomains.Count -eq 0) 494 | { 495 | # No Domains to check - must be a fileread issue. 496 | Write-Host "Unable to read domains from file $Path." 497 | Break 498 | } 499 | 500 | # Verbose Script information on Script version and parameters 501 | Write-Verbose " Script Get-Domain-MailInfo.ps1" 502 | Write-Verbose " Last Updated 2025-05-13" 503 | Write-Verbose "" 504 | Write-Verbose " Checking $($arrDomains.Count) domain(s)" 505 | If ($CheckDKIM) { Write-Verbose " .. checking DKIM using selector $($DKIMSelector)" } 506 | # End Script information Verbose block 507 | 508 | # Check If CSVFile Exists and if it is locked 509 | # If available - create new file if requested 510 | If (fnCheckCSVFileLock -CSVFileName $csvFile -CreateFile $Overwrite) 511 | { 512 | # File exists and is locked. 513 | # Softfail to run script with no output to CSV. 514 | $bolCSV = $false 515 | } 516 | else 517 | { 518 | If ($UseHeader) { Add-Content -Path $CSVFile -Value $headerline } 519 | } 520 | 521 | #If ($UseHeader) { Write-Host $headerline } 522 | # Initialize an array 523 | $arrOutput = @() 524 | 525 | # Create an ordered hashtable and a new PSobject 526 | $rowhash = [ordered]@{ 527 | Domain = "" 528 | HasMX = "" 529 | HasSPF = "" 530 | HasDKIM = "" 531 | HasDMARC = "" 532 | HasStartTLS = "" 533 | MXRecord = "" 534 | SPFRecord = "" 535 | DKIMSelector = "" 536 | DKIMRecord = "" 537 | DMARCRecord = "" 538 | DMARCPolicy = "" 539 | PolicyChecks = "" 540 | } 541 | 542 | [int]$iDomain = 0 543 | # Start enumerating the domain(s) that have been nominated 544 | ForEach ( $domainname in $arrDomains ) 545 | { 546 | Write-Verbose "Domain $($iDomain.ToString('00000')): $domainname" 547 | $iDomain++ 548 | $iDomainPercent = $iDomain/$arrDomains.Count*100 549 | Write-Progress -Activity "Enumerating $($arrDomains.Count) domain(s)" -Id 1 -PercentComplete $iDomainPercent -CurrentOperation "Checking $($domainname)" 550 | 551 | # Initialize the row PSObject 552 | $row = New-Object PSObject -Property $rowhash 553 | 554 | # First check is to see if this domain can be resolved 555 | If (fnIsDomain -domname $domainname) 556 | { 557 | # Next we try to resolve the MX and SPF records 558 | $dominfoMXDet = fnMXRecord -domname $domainName 559 | If ($dominfoMXDet) { $dominfoMX = $True } else { $dominfoMX = $false } 560 | 561 | # If there is an MX record we check if the MX supports StartTLS 562 | If ($CheckStartTLS -and $dominfoMXDet -ne $False) { 563 | If (!$dominfoMXDet.StartsWith("Null MX") -and !$dominfoMXDet.StartsWith("[Invalid:]")) { 564 | $dominfoSTARTTLS = fnCheckSTARTTLS -mxHost $dominfoMXDet.Split(',')[0] #use the first MX 565 | Write-Verbose "StartTLS: Check returned error $($Error[0].TargetObject)" 566 | } else { 567 | $dominfoSTARTTLS = "#N/A" 568 | } 569 | } else { 570 | $dominfoSTARTTLS = "#N/A" 571 | } 572 | 573 | If ($CheckSPF) 574 | { 575 | $dominfoSPFDet = fnSPFRecord -DomName $domainName 576 | If ($dominfoSPFDet) { $dominfoSPF = $True } else { $dominfoSPF = $dominfoSPFDet = $false } 577 | } 578 | else 579 | { 580 | $dominfoSPF = $dominfoSPFDet = "#N/A" 581 | } 582 | 583 | # Done with DKIM - Let's check DMARC 584 | If ($CheckDMARC) 585 | { 586 | $dominfoDMARCDet = fnDMARCRecord -domname $domainName 587 | If ($dominfoDMARCDet) 588 | { 589 | $dominfoDMARC = $true 590 | $dominfoDMARCPolicy = (Select-String -InputObject $dominfoDMARCDet -Pattern "p=[a-z]*").Matches[0].Value 591 | Write-Verbose $dominfoDMARCPolicy 592 | 593 | } 594 | Else 595 | { 596 | $dominfoDMARC = $dominfoDMARCDet = $dominfoDMARCPolicy = $false 597 | } 598 | } 599 | Else 600 | { 601 | $dominfoDMARC = $dominfoDMARCDet = $dominfoDMARCPolicy = "#N/A" 602 | } 603 | 604 | If ($CheckDKIM) 605 | { 606 | $dominfoDKIMDet = fnDKIMRecord -Domname $domainName -Selector $DKIMSelector 607 | If ($dominfoDKIMDet -match "DKIM1") 608 | { 609 | $dominfoDKIM = $true 610 | } 611 | Else 612 | { 613 | $dominfoDKIM = $false 614 | } 615 | } 616 | else 617 | { 618 | # Not checking DKIM, let's return #N/A 619 | $dominfoDKIM = $dominfoDKIMDet = "#N/A" 620 | } # End DKIM Check 621 | 622 | If ($PolicyChecks) 623 | { 624 | ForEach ($PolicyCheck in $PolicyChecks) 625 | { 626 | # Currently only qualified / unqualified = policies exist (or not) 627 | # Future version (or by referring to other tools): Validate policies 628 | 629 | If ($PolicyCheck -match "Microsoft") 630 | { 631 | # Microsoft specific tests; 632 | # https://techcommunity.microsoft.com/blog/microsoftdefenderforoffice365blog 633 | # See article "Strengthening-email-ecosystem-outlook’s-new-requirements-for-high‐volume-senders" 634 | # SPF + DKIM + DMARC required 635 | # DMARC policy: p=none (or better), strict SPF (aspf=s) and/or DKIM (adkim=s) alignment 636 | 637 | $dominfoDMARCStrict = $dominfoDMARCDet -match "/\a|adkim\=s|aspf\=s/g" 638 | If ($dominfoSPF -and $dominfoDKIM -and $dominfoDMARC -and $dominfoDMARCStrict ) 639 | { $dominfoPolicyChecks += "[Microsoft]Qualified" } 640 | else 641 | { $dominfoPolicyChecks += "[Microsoft]Unqualified" } 642 | 643 | $dominfoPolicyChecks += "(SPF$($dominfoSPF);DKIM$($dominfoDKIM);DMARC$($dominfoDMARC);DMARCStrict$($dominfoDMARCStrict));" 644 | Clear-Variable dominfoDMARCStrict 645 | } 646 | ElseIf ($PolicyCheck -match "Google") 647 | { 648 | # Google specific tests; 649 | # https://support.google.com/a/answer/14229414?sjid=13830646897479129552-EU 650 | If ($dominfoSPF -and $dominfoDKIM -and $dominfoDMARC) 651 | { $dominfoPolicyChecks += "[Google]Qualified" } 652 | else 653 | { $dominfoPolicyChecks += "[Google]Unqualified" } 654 | 655 | $dominfoPolicyChecks += "(SPF$($dominfoSPF);DKIM$($dominfoDKIM);DMARC$($dominfoDMARC));" 656 | 657 | } 658 | Else {$dominfoPolicyChecks += "[$PolicyCheck]NoTestAvailable(SPF$($dominfoSPF);DKIM$($dominfoDKIM);DMARC$($dominfoDMARC));"} 659 | Write-Verbose "Policy Checks: $dominfoPolicyChecks" 660 | } 661 | } 662 | else { $dominfoPolicyChecks = "#N/A;" } 663 | $dominfoPolicyChecks = $dominfoPolicyChecks.TrimEnd(";") 664 | } 665 | else 666 | { 667 | # Domain lookup failed - set all columns but domainname to #N/A 668 | $dominfoMX = "#N/A" 669 | $dominfoSPF = "#N/A" 670 | $dominfoDKIM = "#N/A" 671 | $dominfoDMARC = "#N/A" 672 | $dominfoSTARTTLS = "#N/A" 673 | $dominfoMXDet = "#N/A" 674 | $dominfoSPFDet = "#N/A" 675 | $dominfoDKIMDet = "#N/A" 676 | $dominfoDMARCDet = "#N/A" 677 | $dominfoDMARCPolicy = "#N/A" 678 | $dominfoPolicyChecks = "#N/A" 679 | 680 | } 681 | $row.Domain = $domainname 682 | $row.HasMX = $dominfoMX 683 | $row.HasSPF = $dominfoSPF 684 | $row.HasDKIM = $dominfoDKIM 685 | $row.HasDMARC = $dominfoDMARC 686 | $row.HasStartTLS = $dominfoSTARTTLS 687 | $row.MXRecord = $dominfoMXDet 688 | $row.SPFRecord = $dominfoSPFDet 689 | $row.DKIMSelector = $DKIMSelector -Join "/" 690 | $row.DKIMRecord = $dominfoDKIMDet 691 | $row.DMARCRecord = $dominfoDMARCDet 692 | $row.DMARCPolicy = $dominfoDMARCPolicy 693 | $row.PolicyChecks = $dominfoPolicyChecks 694 | 695 | $arroutput += $row 696 | Clear-Variable row 697 | 698 | Clear-Variable dominfo* 699 | } 700 | # Remove progress bar 701 | Write-Progress -Activity "Enumerating domain(s)" -Id 1 -Completed 702 | 703 | If ($CreateGraphs) 704 | { 705 | #Create PieCharts 706 | $arrKeys = @($true, $false, "#N/A") 707 | $arrProtType = @("HasSPF", "HasDKIM", "HasDMARC") 708 | ForEach ($strProtType in $arrProtType) 709 | { 710 | $arrProt = [ordered]@{} 711 | $pngFileName = "$($pngFile)_$($strProtType).png" 712 | ForEach ($strKey in $arrKeys) 713 | { 714 | $istrKeyCount = $($arrOutput.Where{ $_.$strProtType -like $strKey }.Count) 715 | if ($istrKeyCount -gt 0) { $arrProt.Add("$($strKey.ToString()) ($($istrKeyCount))", $istrKeyCount)} 716 | } 717 | 718 | fnBuildGraph -PNGFileName $pngFileName -ProtectionType $strProtType -ProtectionData $arrProt 719 | $arrProt.Dispose 720 | 721 | } 722 | } 723 | 724 | # Return output, save to CSV (if not disabled). 725 | If ($bolCSV) { $arrOutput | Export-Csv -Path $csvFile -Append -NoClobber -NoTypeInformation -UseCulture } 726 | Write-Output $arrOutput 727 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------