PureBasic

SMTP Inspection

See more SMTP Examples

Examine an SMTP session to view all communications sent to the SMTP server. PureBasic

IncludeFile "CkEmail.pb"
IncludeFile "CkMailMan.pb"

Procedure ChilkatExample()

    success.i = 0

    mailman.i = CkMailMan::ckCreate()
    If mailman.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkMailMan::setCkSmtpHost(mailman, "smtp.example.com")
    CkMailMan::setCkSmtpUsername(mailman, "myUsername")
    CkMailMan::setCkSmtpPassword(mailman, "myPassword")

    CkMailMan::setCkSmtpPort(mailman, 465)
    CkMailMan::setCkStartTLS(mailman, 1)

    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkEmail::setCkSubject(email, "This is a test")
    CkEmail::setCkBody(email, "This is a test")
    CkEmail::setCkFrom(email, "Alex <alex@example.com>")
    CkEmail::ckAddTo(email,"Christoph","christoph@example2.com")
    CkEmail::ckAddBcc(email,"Victor","victor@example3.com")

    ; Generate the MIME that is sent when SendEmail is called
    mimeStr.s = CkMailMan::ckRenderToMime(mailman,email)
    Debug mimeStr

    success = CkMailMan::ckSendEmail(mailman,email)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        CkEmail::ckDispose(email)
        ProcedureReturn
    EndIf

    success = CkMailMan::ckCloseSmtpConnection(mailman)
    If success <> 1
        Debug "Connection to SMTP server not closed cleanly."
    EndIf

    ; Examine the SMTP session log.
    Debug "----"
    Debug "Smtp Session Log:"
    Debug CkMailMan::ckSmtpSessionLog(mailman)

    ; ---------------------------------------------------
    ; Sample output:
    ; ---------------------------------------------------

    ; MIME-Version: 1.0
    ; Date: Fri, 06 Mar 2026 16:21:00 -0600
    ; Message-ID: <A5DC25990C93EC2676F4FBB2BB3BFA9EB34FF9D3@CHILKAT25>
    ; Content-Type: text/plain; charset=us-ascii; format=flowed
    ; Content-Transfer-Encoding: 7bit
    ; X-Priority: 3 (Normal)
    ; Subject: This is a test
    ; From: Alex <alex@example.com>
    ; To: Christoph <christoph@example2.com>
    ; Bcc: Victor <victor@example3.com>
    ; 
    ; This is a test
    ; ----
    ; Smtp Session Log:
    ; 220 smtp.example.com ESMTP Amazon WorkMail SMTP Service
    ; EHLO MYCOMPUTER<CRLF>
    ; 250-smtp.example.com
    ; 250-8BITMIME
    ; 250-AUTH PLAIN LOGIN
    ; 250 Ok
    ; AUTH LOGIN<CRLF>
    ; 334 VXNlcm5hbWU6
    ; YWRtaW5AY2hpbGthdHNvZnQuY29t<CRLF>
    ; 334 UGFzc3dvcmQ6
    ; {PasswordOrCredentials}
    ; 235 Authentication successful.
    ; MAIL FROM:<alex@example.com><CRLF>
    ; 250 Ok
    ; RCPT TO:<christoph@example2.com><CRLF>
    ; 250 Ok
    ; RCPT TO:<victor@example3.com><CRLF>
    ; 250 Ok
    ; DATA<CRLF>
    ; 354 End data with <CR><LF>.<CR><LF>
    ; {388 bytes} <--- The MIME source of the email (examined via RenderToMime) was sent here.
    ; <CRLF>.<CRLF>
    ; 250 Ok
    ; QUIT<CRLF>
    ; 221 Bye


    CkMailMan::ckDispose(mailman)
    CkEmail::ckDispose(email)


    ProcedureReturn
EndProcedure