Hi, I configured two hosts to forward messages for local accounts to a relay host like this:
myhostname = social.eden.one myorigin = /etc/mailname alias_maps = hash:/etc/aliases sender_canonical_maps = hash:/etc/postfix/sender_canonical mydestination = $myhostname, localhost.localdomain, localhost relayhost = [mail.eden.one]:587 mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 inet_interfaces = loopback-only inet_protocols = all smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/relay_passwd smtp_sasl_security_options = noanonymous The only difference is $myhostname (social and socialnew, respectively). /etc/aliases contains "root: [email protected]" on both hosts. Strangely enough, the hosts handle messages to the local root account differently. When sending a message with echo "Test" | mail -s "Test" root this is what happens: # social 2026-01-16T09:01:45.304481+01:00 social postfix/pickup[1033769]: 4A28540108: uid=0 from=<[email protected]> 2026-01-16T09:01:45.314262+01:00 social postfix/cleanup[1033779]: 4A28540108: message-id=<[email protected]> 2026-01-16T09:01:45.316038+01:00 social postfix/qmgr[1033771]: 4A28540108: from=<[email protected]>, size=325, nrcpt=1 (queue active) 2026-01-16T09:01:45.325662+01:00 social postfix/cleanup[1033779]: 4F45940059: message-id=<[email protected]> 2026-01-16T09:01:45.329087+01:00 social postfix/local[1033781]: 4A28540108: to=<[email protected]>, orig_to=<root>, relay=local, delay=0.04, delays=0.02/0.01/0/0, dsn=2.0.0, status=sent (forwarded as 4F45940059) 2026-01-16T09:01:45.329315+01:00 social postfix/qmgr[1033771]: 4F45940059: from=<[email protected]>, size=456, nrcpt=1 (queue active) 2026-01-16T09:01:45.329400+01:00 social postfix/qmgr[1033771]: 4A28540108: removed # socialnew 2026-01-16T09:50:48.132515+01:00 socialnew postfix/pickup[1902]: 204178035A: uid=0 from=<[email protected]> 2026-01-16T09:50:48.137059+01:00 socialnew postfix/cleanup[1912]: 204178035A: message-id=<[email protected]> 2026-01-16T09:50:48.137838+01:00 socialnew postfix/qmgr[1903]: 204178035A: from=<[email protected]>, size=335, nrcpt=1 (queue active) 2026-01-16T09:50:48.801409+01:00 socialnew postfix/smtp[1914]: 204178035A: to=<[email protected]>, relay=mail.eden.one[2a01:4f8:1c1f:876d:8000::10]:587, delay=0.67, delays=0.01/0.02/0.28/0.37, dsn=2.0.0, status=sent (250 2.0.0 3b1bfbad Message accepted for delivery) 2026-01-16T09:50:48.801507+01:00 socialnew postfix/qmgr[1903]: 204178035A: removed The host social acts as intended, and the mail arrives at the mailbox with [email protected] as the recipient. From socialnew, I get messages to "root <[email protected]>" instead, and Postfix does not relay the message locally (before forwarding it). If I specify the FQDN with the test message echo "Test" | mail -s "Test" [email protected] I get the intended result on socialnew, but I fail to understand why social expands "root" properly, and socialnew does not. - Jan _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
