That's because your exchange thinks that it is the owner of mail.com domain. Anything with a mail.com domain extension is assumed to be an internal user. Exchange then tries to resolve the email address to a recipient and it fails since there is no such user on the exchange side.
Since you're moving away from sendmail, you may want to add a subdomain to your clients defined only on the unix box such as unix.mail.com and then put a routing statement in the Connections tab of IMS. S. -----Original Message----- From: Craigster [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 13, 2001 9:03 AM To: Exchange Discussions Subject: Please help with SMTP routing issue I need some help with an SMTP routing issue. I have two separate mail systems on the same LAN, migrating from UNIX sendmail to MS Exchange 5.5. Both systems are using the same "mail.com" domain for addressing. For example, both servers use addresses in the format "[EMAIL PROTECTED]" Essentially, any incoming email is parsed through the UNIX Sendmail bridgehead server aliases and distributed from there. The UNIX server is my domain MX. My problem is this...every time I use SMTP from Exchange to send an email to someone on the UNIX mail system ("[EMAIL PROTECTED]", for example) the exchange server returns the message as undeliverable (this account only exists on the UNIX system, not on the Exchange server). It looks at itself for "mail.com" accounts, I am guessing, and for some reason doesn't then go out and use the MX for the domain to send the message to my UNIX bridgehead server. Using Exchange RPC or OWA works without a problem, but SMTP messages don't reach the UNIX machine. Any ideas??? Thanks people... _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
