I set up a regular, non-forwarded, email address, to see if i could see it from the webmail
facility. I tried sending messages to it from a yahoo email address.
(1) The webmail isn’t working, roundcube simply doesn’t load.
(2) I just received this message from yahoo:
Sorry, we were unable to deliver your message to the following address. <email@example.com>: Unable to deliver message after multiple retries, giving up.
This seems consistent with the suggestion that the SMTP server, mx.epizy.com, is not responding.