Hi All, I have a co-lo box that up till now has only handled web hosting (no probs,) but now it also needs to do a bit of mail business.. Sendmail 8.10.1 vitusertables blah, incoming is fine. Outgoing on the other hand, doesn't happen edited log file: Dec 8 16:00:52 <server-name> sendmail[15714]: eB850qg15714: ruleset=check_mail, arg1=<[EMAIL PROTECTED]>, relay=<dial-up-router> [ip], reject=553 5.5.4 <[EMAIL PROTECTED]>... Domain name required Dec 8 16:00:52 <server-name> sendmail[15714]: eB850qg15714: from=<[EMAIL PROTECTED]>, size=3527, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=<dial-up-router> [ip] anyone know about the "Domain name required" its is a valid system user (with domain)... uurrrggg... anyone? Arthur -- SLUG - Sydney Linux User Group Mailing List - http://slug.org.au/ More Info: http://slug.org.au/lists/listinfo/slug