Monday, June 22, 2026
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[04:45:42] <Kim Minh> Melchisedech: regarding 2., "the standard content you get in such cases" usually points out the reason for the mail being undelivered. So you should read it carefully and try to understand it. If there is no private information you could share it.
[06:29:54] <tituspijean> @melchisedechfromsalem:matrix.org Regarding 1: it is quite possible your router does not answer to YunoHost's UPnP requests. Check the Tools>Firewall menu in the webadmin, make sure it is disabled (at the bottom of the page), and disable all switches in the UPnP column on that page.
[19:55:13] <Melchisedech[m]> I went to Tools>Firewall. UPnP was disabled at the bottom, and disabled all the switches. Nothing changed. I restarted the nftables service. Still the same.
[19:57:41] <Melchisedech[m]> ```
This is the mail system at host xxx.ddd.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<admin@xxxx.ddd> (expanded from <root>): user unknown
```
I remember there was an admin user back in the days, and that I have this error since the migration to the version that removed this user. But I don’t know how to solve the problem.
[20:00:01] <tituspijean> @melchisedechfromsalem:matrix.orgthen you can simply run `sudo yunohost firewall upnp disable`
[20:00:34] <tituspijean> ("*simply*", it's not like I re-discovered that 30 seconds ago 🙃 )
[20:02:27] <tituspijean> There should be an alias for that address on the admins group, can you check that with `yunohost user group info admins` ?
[20:13:44] <Melchisedech[m]> Indeed, I get:
```
mail-aliases:
- abuse@dom.ain
- admins@dom.ain
- webmaster@dom.ain
- postmaster@dom.ain
- admin@dom.ain
- root@dom.ain
members:
- myuser
- admin
permissions:
```
So there is a mail alias… and it seems the admin user still exists.
And indeed, in the webinterface, in Accounts, I can see an admin user, with the mention `admin_legacy`. Can I safely get rid of it?
[20:54:12] <Melchisedech[m]> I did that an hour ago. Still the same.