First of all, my collegue and me were playing with Domain Policies and push installations on Win2k again. Luckily, we can afford full testing environment with simulation domain, etc. It’s nice to know that renaming of default domain policy removes all software SAP Web Application server gave us a strange problem today.
Sending of email worked fine through Exchange SMTP and failed with no verbose errors with exim SMTP. tcpdump showed that ENVID=DIGITAL_BLAH_BLAH_HERE was added to all email addresses. Quick search on Google showed that several people actually have similar problems with some other MTAs. ENVID is used for message status notification, for which Return-Receipt-To is meant actually. No cure for this problem yet.