Simple description: Mail only arrive at initial mail account setup.
This is a very strange problem. I have nextcloud running on my own debian 9 server with postfix/dovecot mail server which works fine. I can get rainloop, roundcube, thunderbird etc working without issue but when I try to use the mail app for nextcloud, only the first setup works. I set up a new email account, it works and it downloads all messages but that’s it. New messages don’t arrive and If I try to send an email I get error 500. No error logs in either apache or nextcloud. If I check the settings for the account, the password fields are empty (not sure if they are supposed to be or not) if I enter my password again and save, the page freezes for a moment but nothing happens.
Any ideas what this could be? The only thing I can think of now is that it’s a database issue but I have no idea how to problem solve because I’m a total newbie with databases…
What i’ve tried.
Other email accounts, no difference.
Complete uninstall and reinstall of nextcloud.
Complete removal of entire virtual host in virtualmin for fresh install. Same issue every time.
Nextcloud version 16.0.4