http://bugzilla.opensuse.org/show_bug.cgi?id=1192173 Bug ID: 1192173 Summary: postfix default main.cf myhostname default causes conflict Classification: openSUSE Product: openSUSE Distribution Version: Leap 15.3 Hardware: Other OS: openSUSE Leap 15.3 Status: NEW Severity: Normal Priority: P5 - None Component: Network Assignee: screening-team-bugs@suse.de Reporter: jon.brightwell@zpg.co.uk QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- https://build.opensuse.org/package/view_file/server:mail/postfix/postfix-mai... myhostname = localhost If you have more than one postfix (server -> mta -> inet), the email will bounce at first hop. Upstream myhostname default is nothing (resulting in gethostname()). Even the sysconfig will do "$(hostname -f)" if blank. For those of us not using sysconfig, the default setting of localhost is no sane. Please remove the line for the safe default or leave it blank. The example error if both servers are set to localhost: mailrelay1 postfix/smtp[7779]: warning: host webmail.dev02.net[10.122.2.172]:25 greeted me with my own hostname localhost mailrelay1 postfix/smtp[7779]: warning: host webmail.dev02.net[10.122.2.172]:25 replied to HELO/EHLO with my own hostname localhost 6C01F1C015E8: to=<test@test.uk>, relay=webmail.dev02.net[10.122.2.172]:25, delay=0.01, delays=0.01/0/0/0, dsn=5.4.6, status=bounced (mail for [webmail.dev02.net]:25 loops back to myself) -- You are receiving this mail because: You are on the CC list for the bug.