Look at the headers of the messages that were received by the external
recipients (have them send you the headers) and see where those messages
were sitting.
Also look at the tracking logs.
Also look at the SMTP logs.
Are your POP3 clients configured to use your Exchange server as an SMTP
server?
When a POP3 client sends mail, it does straight to an SMTP queue. If the
message is for an external recipient, the message does not loop around
anywhere else in the Exchange server. Just SMTP queue and then - out the
door.
Sincerely,
Andrey Fyodorov
Systems Engineer
Messaging and Collaboration
Spherion
-Original Message-
From: Atkinson, Daniel [mailto:[EMAIL PROTECTED]
Sent: Friday, October 17, 2003 9:29 AM
To: Exchange Discussions
Subject: POP3 clients external mail delayed
Something strange is happening with POP3 clients on our Exchange 5.5 SP4
server. When they send mail to other mailboxes on the exchange server,
no
problem, the mail arrives immediately. When they send to external
recipients
the mail takes ages to be delivered, e.g. we sent a test message on
Thursday
afternoon and it didn't arrive in the external mailbox until Friday
morning!
The messages aren't stuck in the IMC queues and I'm not sure where else
to
look.
Any help much appreciated!
Dan.
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