When an outgoing message contains a large attachment (a couple of megs or more) via the Outlook client, the message will get stuck in a loop and deliver over and over again to the recipients. The message stays in the outbox of Outlook and the qmail queue continues to fill and send out this same message over and over again. The only way to stop it is to manually remove it from the outbox and clear the queue on the server. What's going on and how do I fix it? Thanks in advance.