DataFlex

Fetch One POP3 Message by Message Number

Demonstrates the Chilkat MailMan.FetchOne method, which retrieves one message by POP3 message number and stores it in an Email object. The arguments are headerOnly, numBodyLines, the message number (the first message is 1), and the Email. The message remains on the server. This example fetches message 1 in full.

Background: POP3 message numbers are simple 1-based positions valid only for the current session. FetchOne is the way to pull a single message straight into an Email object (rather than a bundle) when you know its position — for example after listing the mailbox. Because numbers can shift between sessions, FetchByUidl is the stabler choice when a message must be identified reliably over time.

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DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoMailman
    Variant vEmail
    Handle hoEmail
    String sTemp1

    Move False To iSuccess

    //  Demonstrates the MailMan.FetchOne method, which retrieves one message by POP3 message
    //  number and stores it in an Email object.  The arguments are headerOnly, numBodyLines, the
    //  message number (the first message is 1), and the Email.  The message remains on the server.

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

    //  Configure the POP3 server connection.
    Set ComMailHost Of hoMailman To "pop.example.com"
    Set ComMailPort Of hoMailman To 995
    Set ComPopSsl Of hoMailman To True
    Set ComPopUsername Of hoMailman To "user@example.com"
    Set ComPopPassword Of hoMailman To "myPassword"

    //  Fetch message number 1 in full.  headerOnly=False (fetch the entire message).
    //  Note: numBodyLines only applies when headersOnly is True (it sets how many lines of the
    //  body to include along with the headers).  When headersOnly is False, the entire message
    //  is fetched and numBodyLines is ignored.
    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End

    Get pvComObject of hoEmail to vEmail
    Get ComFetchOne Of hoMailman False 0 1 vEmail To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMailman To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComSubject Of hoEmail To sTemp1
    Showln "Subject: " sTemp1
    Get ComFrom Of hoEmail To sTemp1
    Showln "From: " sTemp1

    //  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.


End_Procedure