): mail
for subdomain.domain-a.tld loops back to myself
---
Reporting-MTA: dns; subdomain.domain-a.tld
X-Postfix-Queue-ID: 4A2C3E21779
X-Postfix-Sender: rfc822; SRS0=s+WX=3E=senderdomain.tld=senderuser@subdomain.domain-a.tld
Arrival-Date: Sun, 24 Aug 2025 17:18:26 +0200 (CEST)
Final-Recipient: rfc822; alice@subdomain.domain-a.tld
Original-Recipient: rfc822;alice@domain-a.tld
Action: failed
Status: 5.4.6
Diagnostic-Code: X-Postfix; mail for subdomain.domain-a.tld loops back to
myself
```
---
### Author:  [@peer](https://forum.yunohost.org/u/peer)
#### Post date: [August 24, 2025, 10:31pm UTC](https://forum.yunohost.org/t/solved-mail-loops-back-to-myself-probably-related-to-12-1-upgrade/38383/8 "2025-08-24T22:31:06Z")
Please let me know if I should provide the output of any command or log
---
### Author:  [@jarod5001](https://forum.yunohost.org/u/jarod5001)
#### Post date: [August 24, 2025, 10:39pm UTC](https://forum.yunohost.org/t/solved-mail-loops-back-to-myself-probably-related-to-12-1-upgrade/38383/9 "2025-08-24T22:39:28Z")
Can you share the content of /etc/hosts?
---
### Author:  [@peer](https://forum.yunohost.org/u/peer)
#### Post date: [August 24, 2025, 10:45pm UTC](https://forum.yunohost.org/t/solved-mail-loops-back-to-myself-probably-related-to-12-1-upgrade/38383/10 "2025-08-24T22:45:18Z")
Sure, there you go.
```auto
127.0.0.1 localhost
127.0.0.1 subdomain.domain-a.tld subdomain domain-a.tld berenjenal
127.0.0.1 muc.domain-a.tld
127.0.0.1 xmpp-upload.domain-a.tld
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback domain-a.tld
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
::1 muc.domain-a.tld
```
---
### Author:  [@jarod5001](https://forum.yunohost.org/u/jarod5001)
#### Post date: [August 24, 2025, 11:02pm UTC](https://forum.yunohost.org/t/solved-mail-loops-back-to-myself-probably-related-to-12-1-upgrade/38383/11 "2025-08-24T23:02:52Z")
```auto
cat /etc/hosts
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
127.0.1.1 domain.com domain
```
This is mine, although I have multiple other domains and subdomains. You can try commenting some of the extra lines
---
### Author:  [@peer](https://forum.yunohost.org/u/peer)
#### Post date: [August 26, 2025, 3:06pm UTC](https://forum.yunohost.org/t/solved-mail-loops-back-to-myself-probably-related-to-12-1-upgrade/38383/12 "2025-08-26T15:06:30Z")
I tried. The problem is still there : (
---
### Author:  [@jarod5001](https://forum.yunohost.org/u/jarod5001)
#### Post date: [August 26, 2025, 5:04pm UTC](https://forum.yunohost.org/t/solved-mail-loops-back-to-myself-probably-related-to-12-1-upgrade/38383/13 "2025-08-26T17:04:56Z")
You confirm that `yunohost tools regen-conf --dry-run --with-diff ` gives empty output?
Try disabling the vpn then make a test?
---
### Author:  [@peer](https://forum.yunohost.org/u/peer)
#### Post date: [August 26, 2025, 8:27pm UTC](https://forum.yunohost.org/t/solved-mail-loops-back-to-myself-probably-related-to-12-1-upgrade/38383/14 "2025-08-26T20:27:18Z")
Thank YunoGod it is finally fixed, I was pulling my hair out.
It was just a couple of easy things (I do not see any relationship between them) but, as they were happening at the same time, it looked very confusing.
I noticed the contents of my `/etc/postfix/virtual-mailbox-domains` file did not include my subdomain, only the domain. I just included the subdomain by enabling email for that subdomain on the domains section of the webadmin interface. That fixed the mail-loop-back-to-myself problem.
Then users started to receive incoming email. All but alice. But once email was working for everyone, alice’s problem was easy to solve.
```auto
root@subdomain:~# cd /var/mail
root@subdomain:/var/mail# ls -hal | grep alice
drwx--S--- 39 vmail mail 4.0K Aug 22 21:19 BOGUS.alice.f4A5
-rw-rw---- 1 alice mail 23K Aug 22 23:57 alice
root@subdomain:/var/mail#
root@subdomain:/var/mail# mkdir -p /root/alice-just-in-case-backup
root@subdomain:/var/mail# cp -a /var/mail/alice /var/mail/BOGUS.alice.f4A5 /root/alice-just-in-case-backup/
root@subdomain:/var/mail# rm alice
root@subsomain:/mai/mail# mv BOGUS.alice.f4A5 alice
root@subsomain:/mai/mail# systemctl restart dovecot
```
Thank you very much @jarod5001 and @rodinux for your help!
---
### Author:  [@system](https://forum.yunohost.org/u/system)
#### Post date: [September 25, 2025, 8:28pm UTC](https://forum.yunohost.org/t/solved-mail-loops-back-to-myself-probably-related-to-12-1-upgrade/38383/15 "2025-09-25T20:28:02Z")
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