cPanel Forums

I have a problem that this problem appears when the user tries to reset the password on this site: https://mysite.com

It seems that the message is not arriving and I checked the mail it gives me this error:
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

[email protected]
all hosts for 'gmail.com' have...

How do I fix this error?