[SOLVED] "mail for $domain$ loops back to myself"

pmbaeum

Member
Sep 29, 2020
13
3
23
39
Hi,

I'm currently having issues sending outbound mails.
At first I believed it might be an error in my settings, but I restored a known-good backup and the error persists - and doesn't really make sense to me...

Log of outgoing mail:
2025-07-08T17:33:28.419565+02:00 mail postfix/smtpd[2570]: connect from exchange.companydomain.de[192.168.0.3]
2025-07-08T17:33:28.437807+02:00 mail postfix/smtpd[2570]: Anonymous TLS connection established from exchange.companydomain.de[192.168.0.3]: TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)
2025-07-08T17:33:28.442822+02:00 mail postfix/smtpd[2570]: 6C057A05BD: client=exchange.companydomain.de[192.168.0.3]
2025-07-08T17:33:28.457918+02:00 mail postfix/cleanup[2134]: 6C057A05BD: message-id=<024fe327a08e4b799d46553bdb815458@companydomain.de>
2025-07-08T17:33:28.478931+02:00 mail postfix/qmgr[1934]: 6C057A05BD: from=<myuser@companydomain.de>, size=654732, nrcpt=1 (queue active)
2025-07-08T17:33:28.481839+02:00 mail postfix/smtpd[2570]: disconnect from exchange.companydomain.de[192.168.0.3] ehlo=2 starttls=1 mail=1 rcpt=1 bdat=1 quit=1 commands=7
2025-07-08T17:33:28.605660+02:00 mail pmg-smtp-filter[1907]: A0B61686D3A48819DE: new mail message-id=<024fe327a08e4b799d46553bdb815458@companydomain.de>#012
2025-07-08T17:33:29.012277+02:00 mail postfix/smtpd[2578]: connect from localhost.localdomain[127.0.0.1]
2025-07-08T17:33:29.015272+02:00 mail postfix/smtpd[2578]: 03A70A0BA1: client=localhost.localdomain[127.0.0.1], orig_client=exchange.companydomain.de[192.168.0.3]
2025-07-08T17:33:29.022385+02:00 mail postfix/cleanup[2134]: 03A70A0BA1: message-id=<024fe327a08e4b799d46553bdb815458@companydomain.de>
2025-07-08T17:33:29.094349+02:00 mail postfix/qmgr[1934]: 03A70A0BA1: from=<myuser@companydomain.de>, size=655591, nrcpt=1 (queue active)
2025-07-08T17:33:29.095137+02:00 mail postfix/smtpd[2578]: disconnect from localhost.localdomain[127.0.0.1] ehlo=1 xforward=1 mail=1 rcpt=1 data=1 commands=5
2025-07-08T17:33:29.095312+02:00 mail pmg-smtp-filter[1907]: A0B61686D3A48819DE: accept mail to <myprivate@gmail.com> (03A70A0BA1) (rule: default-accept)
2025-07-08T17:33:29.102279+02:00 mail pmg-smtp-filter[1907]: A0B61686D3A48819DE: processing time: 0.541 seconds (0, 0.339, 0)
2025-07-08T17:33:29.102774+02:00 mail postfix/lmtp[2572]: 6C057A05BD: to=<myprivate@gmail.com>, relay=127.0.0.1[127.0.0.1]:10023, delay=0.66, delays=0.04/0/0.05/0.57, dsn=2.5.0, status=sent (250 2.5.0 OK (A0B61686D3A48819DE))
2025-07-08T17:33:29.103428+02:00 mail postfix/qmgr[1934]: 6C057A05BD: removed
2025-07-08T17:33:29.106549+02:00 mail postfix/smtp[2579]: 03A70A0BA1: to=<myprivate@gmail.com>, [B]relay=gmail-smtp-in.l.google.com[64.233.166.27]:25[/B], delay=0.09, delays=0.08/0/0.01/0, dsn=5.4.6, status=bounced (mail for gmail.com loops back to myself)
2025-07-08T17:33:29.111291+02:00 mail postfix/qmgr[1934]: 03A70A0BA1: removed

gmail.com clearly get's resolved to <strong>64.233.166.27</strong> - so I don't get why that loops back?