DataFlex

Fetch All Messages from a POP3 Mailbox

Demonstrates the Chilkat MailMan.FetchAll method, which retrieves messages from the POP3 mailbox and appends them to an EmailBundle. The arguments are keepOnServer, headersOnly, numBodyLines, and the EmailBundle that receives the emails. This example downloads every message and iterates the bundle, printing each subject.

Background: An EmailBundle is Chilkat's container for a set of downloaded messages — you read its MessageCount and pull out each Email with EmailAt. The three flags control how much is fetched: keepOnServer leaves copies in the mailbox rather than removing them, headersOnly downloads just the headers for a fast preview, and numBodyLines can fetch a partial body (0 means the whole body). Traditional POP3 clients download and delete; setting keepOnServer to true supports "leave mail on server" behavior.

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DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoMailman
    Variant vBundle
    Handle hoBundle
    Integer n
    Variant vEmail
    Handle hoEmail
    Integer i
    String sTemp1

    Move False To iSuccess

    //  Demonstrates the MailMan.FetchAll method, which retrieves messages from the POP3 mailbox
    //  and appends them to an EmailBundle.  The arguments are keepOnServer, headersOnly,
    //  numBodyLines, and the EmailBundle that receives the emails.

    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 all messages, leaving them on the server, with full bodies.
    //  keepOnServer=True, headersOnly=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(cComChilkatEmailBundle)) To hoBundle
    If (Not(IsComObjectCreated(hoBundle))) Begin
        Send CreateComObject of hoBundle
    End

    Get pvComObject of hoBundle to vBundle
    Get ComFetchAll Of hoMailman True False 0 vBundle To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMailman To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComMessageCount Of hoBundle To n
    Showln "Fetched " n " messages."

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End

    For i From 0 To (n - 1)
        Get pvComObject of hoEmail to vEmail
        Get ComEmailAt Of hoBundle i vEmail To iSuccess
        Get ComSubject Of hoEmail To sTemp1
        Showln sTemp1
    Loop

    //  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