>By which you mean that sendmail.cf contains the line: >DSrelay:mail.xyz.com ? Yes that is correct. >SMART_HOST will relay mail to destinations for which it doesn't have explicit routing information. > Do you also have a mailertable defined which might include the recipient domain, for example? No there are no other entries in the mailertable or access files. > Try "sendmail -d60.5 -bv [user at example.com]" to see what might be going on with local address parsing. This looks OK. (names have been changed) sendmail -d60.5 -bv bob at address.com map_lookup(dequote, root, %0=root) => NOT FOUND (0) map_lookup(host, address.com, %0=address.com) => address.com. (0) map_lookup(mailertable, address.com, %0=address.com) => NOT FOUND (0) map_lookup(mailertable, .com, %0=.com, %1=address, %2=address) => NOT FOUND (0) map_lookup(mailertable, ., %0=., %1=address.com) => NOT FOUND (0) bob at address.com... deliverable: mailer relay, host mail.xyz.com, user bob at address.com So nothing extra in any files - but then /var/log/maillog instread of relay to mail.xyz.com it goes somewhere else. Thoughts? Thanks, jerry