Newly created Extension is not receiving welcome email.

[jmcnally]

I have purchased subscription for the 3CX Professional 4SC. I just created a new extension, but the user is not receiving the welcome email. I checked and the user is receiving other emails, so the Microsoft365 account is active, and email is flowing.
I have kept the 3CX SMTP Server as default until it is needed to be changed. I ran tests from the 3CX SMTP Server to my email address and I receive them.
I wonder if I am overlooking something concerning the user. As far as I understand the license allows me to create as many extensions as needed as long as I have the 4SC.
Can someone help me try to resolve this issue?

 

[Guillaume Bourgeois]

Can I return change back the email address?

If you've received confirmation from the 3CX team (As suggested by @Charles_3CX) that the address has been removed from the blacklist (if that was indeed the issue), then yes, you can replace the temporary email with the actual one.
So, change [email protected] to [email protected],