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I've got a recurring problem with messages getting stuck in my Exchange 2003 server's outgoing queue after being successfully delivered, causing them to be redelivered regularly. Near as I can tell the queued messages will resend when I unmount and then remount the message store, or restart the server.<br />
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The problem has only been observed with email sent from a small newsletter distribution to outside clients that is sent as a bcc. The newsletters have attached .pdf's in about the 200-400kb range. Not all addresses on the BCC list are affected by this. <br />
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I've got only one Exchange server for my organization. I've also got a PIX firewall. I read the following in another topic: &quot;A common cause of that problem is a firewall interfering with the traffic. The PIX is notorious for this.&quot; &nbsp; If the PIX is a likely suspect, is there anything that can be done to stop it from interfering or work around it? What is the nature of its interference?<br />
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And if not the firewall, is there another common cause?<br />
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I've got a recurring problem with messages getting stuck in my Exchange 2003 server's outgoing queue after being successfully delivered, causing them to be redelivered regularly. Near as I can tell the queued messages will resend when I unmount and then remount the message store, or restart the server.

The problem has only been observed with email sent from a small newsletter distribution to outside clients that is sent as a bcc. The newsletters have attached .pdf's in about the 200-400kb range. Not all addresses on the BCC list are affected by this. 

I've got only one Exchange server for my organization. I've also got a PIX firewall. I read the following in another topic: "A common cause of that problem is a firewall interfering with the traffic. The PIX is notorious for this."   If the PIX is a likely suspect, is there anything that can be done to stop it from interfering or work around it? What is the nature of its interference?

And if not the firewall, is there another common cause?



Messages get stuck in Exchange queue after delivery, and keep redelivering

Software is any set of instructions that directs a computer to perform specific tasks or operations. Computer software consists of programs, libraries and related non-executable data (such as documentation). Computer software is non-tangible, contrasted with computer hardware, which is the physical component of computers. Software written in a machine language is known as "machine code". However, in practice, software is usually written in high-level programming languages than machine language. High-level languages are translated into machine language using a compiler or interpreter or a combination of the two.

Software

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.