: Recipient address rejected: User unknown (in reply to RCPT TO command))
```
\*\* It looks like domain name is stripped \*\*
from @dev.laaasdsad\_pl to @laaasdsad\_pl right ? \*\*
I tried to:
```auto
Success! Configuration updated for 'yunohost'
Success! Configuration updated for 'nginx'
Success! Configuration updated for 'dnsmasq'
dnsmasq:
```
then `reboot `
I checked:
```auto
szymki@laaasdsad:/etc/default$ sudo cat postsrsd
Default settings for postsrsd
Local domain name.
Addresses are rewritten to originate from this domain. The default value
is taken from postconf -h mydomain and probably okay.
SRS_DOMAIN=laaasdsad_pl
Exclude additional domains.
You may list domains which shall not be subjected to address rewriting.
If a domain name starts with a dot, it matches all subdomains, but not
the domain itself. Separate multiple domains by space or comma.
We have to put some "dummy" stuff at start and end... see this comment :
SRS_EXCLUDE_DOMAINS="dummy laaasdsad_pl dev.laaasdsad_pl dummy"
```
I also checked:
```auto
szymki@laaasdsad:~$ cat /etc/postfix/virtual-mailbox-domains
This file is regenerated automatically
Please DO NOT edit manually ... changes will be overwritten!
dev.laaasdsad_pl
```
OVH mail configuration looks like:
```auto
;relate with OVH mail box in main domain
$TTL 3600
IN NS dns100.ovh.net.
IN NS ns100.ovh.net.
IN MX 50 mx2.mail.ovh.net.
IN MX 5 mx1.mail.ovh.net.
IN MX 100 mx3.mail.ovh.net.
IN MX 1 mx0.mail.ovh.net.
;related with dev group mail boxes
dev IN MX 10 dev.laaasdsad_pl.
dev IN A 195.222.XXX.XX
dev 3600 IN TXT "v=spf1 a mx ip4:195.222.XXX.XX -all"
```
### Share relevant logs or error messages
Do you have any suggestions ?
---
### Author:  [@tmb](https://forum.yunohost.org/u/tmb)
#### Post date: [September 18, 2026, 8:06am UTC](https://forum.yunohost.org/t/subdomain-emails-are-redirected-to-main-domain/43015/2 "2026-09-18T08:06:38Z")
Did you try sending from outside of yunohost?
Could be yet onother issue, I had not tested local sending to a subdomain of the main-domain:
> [@Issues to fix email breakages caused by upgrades (regression)](https://forum.yunohost.org/t/issues-to-fix-email-breakages-caused-by-upgrades-regression/42922):
>
> Hello yunohost devs. I attempt to triage and formulate the issues that are the root cause(s) for my problems with the email system that surfaced while upgrading from Yunohost 11 to 12. And for which I also found some other prior reports about. I currently suspect things may boil down to two issues and causes, but as email is not an easy topic for me I hope you can help to nail down proper fixes, to continue yunohost’s fabulous “just works” email setup. The problems I see: Email recept…
---
### Author:  [@Szymon](https://forum.yunohost.org/u/Szymon)
#### Post date: [September 18, 2026, 8:53am UTC](https://forum.yunohost.org/t/subdomain-emails-are-redirected-to-main-domain/43015/3 "2026-09-18T08:53:36Z")
Hey,
Yes, I tried sending from google and poczta.onet.pl to yunohost subdomain. Main domain email is handled by OVH (IP reputation and not marked as spam).
Detailed rejection information I shared earlier was provided from Onet.pl.
Domains are organized as follows:
laaasdsad\_pl (main domain website hosted by Yunohost but 1 email by OVH)
dev.laaasdsad\_pl (developer apps and mailboxes hosted by Yunohost)
Kindly Regards
---
### Author:  [@tmb](https://forum.yunohost.org/u/tmb)
#### Post date: [September 18, 2026, 9:07am UTC](https://forum.yunohost.org/t/subdomain-emails-are-redirected-to-main-domain/43015/4 "2026-09-18T09:07:02Z")
Sorry, I overlooked your external origin, so there is a known issue involved…
The common experience seems to be that currently the yunohost main-domain must have mail\_in enabled for any secondary-domains to be able to receive email. (See other thread where I tried to summarize the current state of problems.)
---
### Author:  [@tmb](https://forum.yunohost.org/u/tmb)
#### Post date: [September 18, 2026, 10:02am UTC](https://forum.yunohost.org/t/subdomain-emails-are-redirected-to-main-domain/43015/5 "2026-09-18T10:02:49Z")
I don’t know whether “[Subdomain emails are redirected to main domain](https://forum.yunohost.org/t/subdomain-emails-are-redirected-to-main-domain/43015)” would be a problem of its own, if it works for you after you enable mail\_in for the main-domain.
The root problems could just be that currently
- all domains use the main-domain mailboxes, instead of, e.g. generic @localhost mailboxes
- mail\_in for subdomains does not work independently (without mail\_in ‘on’ for main-domain)
While (locally) rewriting unconfigured (i.e. non-mail\_in) sub-domains (not secondary-domains) to their parent-domain could be a feature (a default setting that avoids having to set up users for every configured app-subdomain).
---
### Author:  [@Szymon](https://forum.yunohost.org/u/Szymon)
#### Post date: [September 18, 2026, 10:36am UTC](https://forum.yunohost.org/t/subdomain-emails-are-redirected-to-main-domain/43015/6 "2026-09-18T10:36:36Z")
Hi, I enbaled email inbox in main Yunohost domain without configuring MX at OVH so Yunohost complains about bad configured DNS but looks like it works on both mailboxes OVH and Yunohost dev.laaasdsad\_pl
Thank you for suggestion and support 🙂 👏
---
### Author:  [@system](https://forum.yunohost.org/u/system)
#### Post date: [October 18, 2026, 10:37am UTC](https://forum.yunohost.org/t/subdomain-emails-are-redirected-to-main-domain/43015/7 "2026-10-18T10:37:26Z")
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