Cannot send emails

Hi everyone,

I’m facing a very persistent Postfix issue on a YunoHost server and I’m running out of ideas.
I’d really appreciate any insight from people familiar with YunoHost’s mail stack.

Logs:

The settings and error on Vaultwarden admin page:


Vaultwarden version: 1.35.2~ynh1
YunoHost version: 12.1.39
What type of hardware are you using: VPS bought online

Having only looked at the last line of your post, I can almost guarantee you that your VPS host is blocking all email functions. Most all of them do.

Usually, I can send emails by vaultwarden when I tried to send from terminal there is no problem. What should I do?