DataFlex

Verify Connectivity to the SMTP Server

Demonstrates the Chilkat MailMan.VerifySmtpConnection method, which tests whether a TCP/IP connection can be established with the configured SMTP server. It verifies connectivity only — it does not authenticate. This example configures the SMTP host and checks whether it can be reached.

Background: When a send fails, it helps to know where it broke. VerifySmtpConnection isolates the first hop — can the client even reach the server on the configured host and port, and complete the TLS handshake? A failure here points at networking, firewall, DNS, port, or certificate issues rather than credentials. Once connectivity is confirmed, VerifySmtpLogin tests the authentication step.

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DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoMailman
    Boolean iConnected

    //  Demonstrates the MailMan.VerifySmtpConnection method, which tests whether a TCP/IP
    //  connection can be established with the configured SMTP server.  It verifies connectivity
    //  only (it does not authenticate).

    Get Create (RefClass(cComChilkatMailMan)) To hoMailman
    If (Not(IsComObjectCreated(hoMailman))) Begin
        Send CreateComObject of hoMailman
    End

    //  Configure the SMTP server connection.
    Set ComSmtpHost Of hoMailman To "smtp.example.com"
    Set ComSmtpPort Of hoMailman To 465
    Set ComSmtpSsl Of hoMailman To True

    //  Test connectivity to the SMTP server.
    Get ComVerifySmtpConnection Of hoMailman To iConnected

    If (iConnected = True) Begin
        Showln "Successfully connected to the SMTP server."
    End
    Else Begin
        Showln "Could not connect to the SMTP server."
    End



End_Procedure