I've seen a lot of messages on the forum talking about setting up the email notifications, everyone seems to have a different issue but without a resolve. I've been trying to get my Office 365 email setup for that purpose but failing miserably. As far as I am aware all my settings have been entered in correctly, but when I try and test, I get: -

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

Does anyone know what this is or can anyone shed any light on his this is setup correctly or even is there a third party option out there so I can enable notifications for my staff, as this is really important for them.

Thanks

Anyone?

Use these Setting:

If you are getting an error for SSL Certificate Validation:
Run this command to change the config:

You can set OPENPROJECT_SMTP__OPENSSL__VERIFY__MODE=none if you absolutely need to disable SSL/TLS verification.

On a packaged installation use this command:

openproject config:set OPENPROJECT_SMTP__OPENSSL__VERIFY__MODE=none

Please restart your server after setting this environment variable.

service openproject restart