PureBasic

Delete a POP3 Message via an Email Object

Demonstrates the Chilkat MailMan.DeleteEmail method, which deletes a POP3 message using the UIDL stored in the X-UIDL header of an Email object. The email must contain an X-UIDL header, which it does after being fetched from the server. This example fetches a message and then deletes it.

Background: When Chilkat downloads a POP3 message it records the server UIDL in an X-UIDL header on the Email object. DeleteEmail uses that header to tell the server which message to remove — a natural "process then delete" flow: fetch a message, act on it, then delete it. As always in POP3, the deletion is only committed when the session ends (unless ImmediateDelete is set).

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

Procedure ChilkatExample()

    success.i = 0

    ;  Demonstrates the MailMan.DeleteEmail method, which deletes a POP3 message using the UIDL
    ;  stored in the X-UIDL header of an Email object.  The email must contain an X-UIDL header
    ;  (as it does after being fetched from the server).

    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")

    ;  Fetch a message (headers are enough; the X-UIDL header identifies it on the server).
    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkMailMan::ckFetchOne(mailman,1,0,1,email)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        CkEmail::ckDispose(email)
        ProcedureReturn
    EndIf

    ;  Delete that message using its X-UIDL header.
    success = CkMailMan::ckDeleteEmail(mailman,email)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        CkEmail::ckDispose(email)
        ProcedureReturn
    EndIf

    ;  Unless the ImmediateDelete property is set to 1, the message is only marked for
    ;  deletion.  End the POP3 session (which sends the QUIT command) to commit the deletion.
    success = CkMailMan::ckPop3EndSession(mailman)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        CkEmail::ckDispose(email)
        ProcedureReturn
    EndIf

    Debug "Deleted the email from the POP3 server."

    ;  Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
    ;  connects and authenticates -- using the property settings above -- whenever a server
    ;  operation requires it.  Calling the explicit connect/authenticate methods can still be
    ;  helpful to determine whether a failure occurs while connecting or while authenticating.


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


    ProcedureReturn
EndProcedure