One of my clients got a problem to receive mails from one customer.
He sends mails from its system through isis.servercorner.net
and the mailserver refuses to
accept the mail with a «no such mailbox» answer.
But the mailserver should not look for the mailbox but forward to M365.
We suspect a wrong mx in the dns of servercorner.net
When we look into the mx of the customer, it looks like:
dig mx 4plusarchitektinnen.ch +short
The customer was on a hosting somewhere inside servercorner.net
and we suspect there are
Anybody here from servercorner.net? How to contact?