Hi all. Just an interesting observation I'd like to share (I have already found a way to fix the problem)
We have a mixed 5.5/2000 environment and are in the process of migrating. All the public folders have been migrated and now reside on a 2000 public folder server Some users are still on 5.5 The IMC connectors are still on 5.5 servers (I didn't do it :) it was like this before I started here and there is a change management process to put a 2000 SMTP connector in place soon). The 5.5 IMC connectors are in a separate 5.5 site from the site that contains the mix of 5.5 and 2000 servers, and there is a site connector between sites. There is a public folder that is set up to forward a copy of all mail to a custom recipient (set up in the Exchange General/Delivery properties of the PF, NOT a rule) Here is what I was observing: When a 5.5 user sends mail to this public folder he gets back an NDR. It looks like the NDR comes from one of the 2000 servers. Sometimes the NDR says "5.7.1 Unable to relay to [external SMTP address]", sometimes it just says "Unable to deliver the message due to a recipient problem". Since the public folder only has a replica on a 2000 server, the message is first routed from the user's 5.5 home server to the 5.5 bridgehead server, then via the site connector to the mixed site where it eventually enters the 2000 world. There it gets split and a 2000 server tries to forward a copy to the external SMTP address. In order to do that, Exchange 2000 needs to submit the message to the MTA and shove it back to the Exchange 5.5 world (because the IMCs are only on Exchange 5.5). That's where Exchange 2000 freaks out and sometimes thinks that this is a relay situation or "recipient problem". P.S. the fix was to make a replica of that public folder on one of the Exchange 5.5 servers. _________________________________________________________________ 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]
