PureBasic

End a POP3 Session Without Committing Deletions

Demonstrates the Chilkat MailMan.Pop3EndSessionNoQuit method, which closes the POP3 connection without sending the QUIT command. Pending deletion marks are not committed — messages marked with DELE during the session remain in the mailbox. This example marks a message for deletion and then abandons the session so the deletion does not take effect.

Background: POP3's deferred-deletion model effectively gives you a transaction: marks made with DELE are only applied when the session ends with QUIT. Ending without QUIT is therefore a rollback — useful if an error occurs mid-processing and you'd rather leave the mailbox untouched than risk deleting messages you failed to handle. Use Pop3EndSession when you do want the deletions committed.

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IncludeFile "CkMailMan.pb"

Procedure ChilkatExample()

    success.i = 0

    ;  Demonstrates the MailMan.Pop3EndSessionNoQuit method, which closes the POP3 connection
    ;  WITHOUT sending the QUIT command.  Pending deletion marks are not committed -- messages
    ;  marked with DELE during the session remain in the mailbox.

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

    ;  Configure the POP3 server connection.
    CkMailMan::setCkMailHost(mailman, "pop.example.com")
    CkMailMan::setCkMailPort(mailman, 995)
    CkMailMan::setCkPopSsl(mailman, 1)
    CkMailMan::setCkPopUsername(mailman, "user@example.com")
    CkMailMan::setCkPopPassword(mailman, "myPassword")

    success = CkMailMan::ckPop3BeginSession(mailman)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        ProcedureReturn
    EndIf

    ;  Mark a message for deletion...
    success = CkMailMan::ckDeleteByMsgnum(mailman,1)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        ProcedureReturn
    EndIf

    ;  ...but end the session without QUIT, so the deletion is NOT committed and the message
    ;  remains in the mailbox.
    success = CkMailMan::ckPop3EndSessionNoQuit(mailman)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        ProcedureReturn
    EndIf

    Debug "Session closed without committing the pending deletion."


    CkMailMan::ckDispose(mailman)


    ProcedureReturn
EndProcedure