I have a Plesk Obsidian Web Admin Edition running on Ubuntu 20.04 server.
Now I want to handle a wildcard email-address (testuser.+@mydomain.com) like described in this topic: https://serverfault.com/a/437034/952187
But the domain mydomain.com should not be handled within Plesk. The MX DNS record of course is pointing to the correct plesk server.
When I do the settings like described in this topic https://serverfault.com/a/437034/952187 , I always get the response that user could not be found in virtual mailbox table. So the Plesk handling seems to have higher priority than my changes in virtual_alias_maps.
Is it at all possible to configurate outside plesk?