I noticed that my two WP instances are not sending admin emails. Sendmail seems to be installed on my server (Ubuntu 20.04), which is the default setup believe. I know having your server send emails is notoriously unreliable (they can get flagged as spam), but that’s not the issue here. The problem is the server can’t send email at all. And this causes issues because if you do something like say try to change the WP administrator email or a user’s email, it tries to send a confirmation email, but because it can’t the settings page just hangs.
Using a plugin to test I can trying to send an email through the server (sendmail) returns a “504 Gateway Time-out”.
One thing I did try already was
sudo sendmailconfig and agreed ‘yes’ to everything, as recommended on several tutorials. Unfortunately the server is still not sending anything. Hopefully someone can help get this working…