Hello All!

I'm trying to configure OpenProject to send emails using my SMTP server. Using the admin user, I filled in the options in /admin/settings/mail_notifications page but I'm unable to send a test email. I'm receiving the following error:

An error occurred while sending mail (501 5.1.5 Recipient address reserved by RFC 2606 )

OpenProject version: 12.2.2

OpenProject installation type: Package Installation on Ubuntu 22.04

Thanks in advance!

I was able to solve this problem changing the email account associated with the admin account to a real one.

Thank you for your investigations that unreal email accounts do not work :)