Exchange forwarded to external pop account recieves duplicated email

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    I’ve a problem with an exchange 2000 server (all patches installed) and forwarded pop3 mailboxes at an external provider.

    For some users I have forwarded the emails to a external pop account.
    (exchnage server, user, delivery options, foreward to : external pop3 account
    [v] deliver messages to both forwarding address and mailbox

    If the users receives a email with more then one recipients the identical email is forwarded multiple times.

    Example configuration
    Domain riverhouse.nl

    Exchange 2000 + smtp connector, forward all outgoing mail to a smtp server of the provider.

    Mailboxes:
    [email protected] + forwarded to [email protected] (pop3 account)
    [email protected] + forwarded to [email protected] (pop3 account)
    [email protected]

    Internal mail works fine, but mail receiving from external accounts are delivered multiple times depending on the number of recipients

    Example message

    to: [email protected]
    cc: [email protected]
    cc: [email protected]

    Local network exchange / outlook

    [email protected] : 1 message is delivered at exchange mailbox
    [email protected] : 1 message is delivered at exchange mailbox
    [email protected] : 1 message is delivered at exchange mailbox

    forwarded pop3 mailbox: [email protected] 3 messages are delivered
    forwarded pop3 mailbox: [email protected] 3 messages are delivered

    I think the multiple messages are generated by the exchange server

    Thanks for any suggestions

    Pieter van Ooijen

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