Invitation e-mail doesn't get sent


I’ve recently set up a Nextcloud on my Ubuntu VPS, and everything has been working without major issues, however the calendar mail invitation does not seem to work:

It claims that the e-mail has been sent, but no such e-mail can be found in the inbox. I’ve tried sending it to various different users, to no avail.

Nextcloud version: 22.2.3

  • I have checked the spam-directory, nothing there
  • The SMTP Email server has been set up properly and has been confirmed to work
  • Other system e-mails work fine
  • There are no errors in the Nextcloud system log

What could be causing this issue?


does your event start in the past? the back-end might not send out emails for those events.