Thank you, I will check and do that. I think this feature might be useful.
In the meantime, if someone ends up here after searching for the same thing, here’s how to do it quickly behind the scenes (make sure you know what you’re doing, have backups, you can wreck your config by poking the system like this). Go to the project root and attach to the database:
docker compose exec mysql-mailcow mysql -u root -p"$(grep DBROOT .env | awk -F = '{print $2}')" mailcow
For alias ALIAS@domain.tld
update its description:
UPDATE spamalias SET description="that site account" WHERE address="ALIAS@domain.tld" LIMIT 1;