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. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=& lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]