I have the same problem when I want to subscribe to a forum or topic. I don’t get an email, and after some hours, I got this email:
The following recipient(s) could not be reached:
noreply@www.domain.com
Error Type: SMTP
Connection to recipients server failed.
Error: Could not connect to “IP Adress” on port 25 since this would mean connecting to myself.
Tried 5 time(s)
hMailServer