AutoIt

Send DKIM Signed Email

See more DKIM / DomainKey Examples

Demonstrates how to send DKIM signed email. AutoIt

Local $bSuccess = False

;  This example requires the Chilkat API to have been previously unlocked.
;  See Global Unlock Sample for sample code.

$oMailman = ObjCreate("Chilkat.MailMan")
$oDkim = ObjCreate("Chilkat.Dkim")

;  SMTP server settings...
$oMailman.SmtpHost = "SMTP_DOMAIN"
$oMailman.SmtpUsername = "SMTP_LOGIN"
$oMailman.SmtpPassword = "SMTP_PASSWORD"
$oMailman.SmtpPort = 465
$oMailman.SmtpSsl = True

$oEmail = ObjCreate("Chilkat.Email")

$oEmail.Subject = "This is a test"
$oEmail.Body = "This is a test"
$oEmail.From = "Chilkat Support <support@chilkatsoft.com>"

;  Add some recipients (BCC recipients are added below)
$oEmail.AddTo("Chilkat Software","chilkat_software@yahoo.com")
$oEmail.AddTo("Chilkat Admin","admin@chilkatsoft.com")
$oEmail.AddCC("Chilkat Admin","admin@chilkat.io")

;  When sending an email with a DKIM signature, the MIME
;  of the email must not be modified prior to
;  or during the sending process.  Therefore, the MIME of the
;  email is assembled, the DKIM signature is added, and then
;  SendMimeBd is called to send the email.

;  First get the MIME of the email.  Calling RenderToMimeBd 
;  causes the email to be signed and/or encrypted if those options
;  have been selected.  The MIME returned by RenderToMimeBd
;  is the exact MIME that would've been sent if SendEmail was
;  called.  We'll add a DKIM signature header to this MIME and then send...
$oBdMime = ObjCreate("Chilkat.BinData")
$bSuccess = $oMailman.RenderToMimeBd($oEmail,$oBdMime)
If ($bSuccess = False) Then
    ConsoleWrite($oMailman.LastErrorText & @CRLF)
    Exit
EndIf

;  To create a DKIM signature,
;  you'll need to provide the following:
;  (1) An RSA private key in any common file format.
;  (2) The domain name (typically the same domain
;  as the sender of an email).
;  (3) A selector for the domain name -- an arbitrary string
;  to identify the matching public key in DNS.

;  To allow an email recipient to verify the DKIM signature via an
;  external email client supporting DKIM or using other software,
;  you will need to create a DNS record with the selector
;  and matching public key.  This example does not provide
;  information about DKIM DNS record creation.  
;  (Chilkat does not provide an API for creating DNS records.  
;  Creating the DKIM DNS record is something you would do
;  manually.)

;  Set the domain and selector:
;  You'll need to provide your own values here..
$oDkim.DkimDomain = "chilkatsoft.com"
$oDkim.DkimSelector = "brisbane"

;  Load a private key from any common RSA private key
;  format, such as DER, PKCS8, PEM, XML, etc.
;  The LoadDkimPkFile method automatically detects
;  the file format and reads it appropriately.
;  If a password is not required, you'll still need to provide
;  an empty password string argument, but it is ignored.
Local $sPassword = "passwd"
$oPrivKey = ObjCreate("Chilkat.PrivateKey")
$bSuccess = $oPrivKey.LoadAnyFormatFile("qa_data/pem/rsa_passwd.pem",$sPassword)
If ($bSuccess = False) Then
    ConsoleWrite($oPrivKey.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oDkim.SetDkimPrivateKey($oPrivKey)
If ($bSuccess = False) Then
    ConsoleWrite($oDkim.LastErrorText & @CRLF)
    Exit
EndIf

;  Add the DKIM-Signature header to the MIME in bdMime
$bSuccess = $oDkim.DkimSign($oBdMime)
If ($bSuccess = False) Then
    ConsoleWrite($oDkim.LastErrorText & @CRLF)
    Exit
EndIf

;  If desired, examine the MIME of the email being sent.
$oBdMime.WriteFile("qa_output/dkimSigned.eml")

;  ---- Prepare to send the email contained in bdMime ---

;  To send to multiple email addresses, the strRecipients should be set to a comma-separated
;  list of email addresses.

;  Note: This is where we can add additional BCC addreses.
;  Here we are adding "chilkat.support@gmail.com" as an additional BCC address.
;  Notice that the 1st three email addresses are NOT BCC because these email addresses
;  appear in the MIME header of the email (in the "To" and "CC" header fields).
;  A BCC email address does not appear in the MIME, and thus the non-BCC recipients cannot see
;  that the email was also sent to the BCC address.  (BCC means "blind carbon copy")
Local $strRecipients = "chilkat_software@yahoo.com, admin@chilkatsoft.com, admin@chilkat.io, chilkat.support@gmail.com"
Local $strFrom = "support@chilkatsoft.com"

$bSuccess = $oMailman.SendMimeBd($strFrom,$strRecipients,$oBdMime)
If ($bSuccess = False) Then
    ConsoleWrite($oMailman.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oMailman.CloseSmtpConnection()
If ($bSuccess <> True) Then
    ConsoleWrite("Connection to SMTP server not closed cleanly." & @CRLF)
EndIf

ConsoleWrite("DKIM Signed Mail Sent!" & @CRLF)