27 Feb
2017
27 Feb
'17
4:02 p.m.
Sorry to spam the list for this, but I was not able to find anything close to a technical support email contact on their web page...
To avoid many round trip mails, here's the problem:
we get incoming mails with senders like +4176...@mms.sunrise.ch.
But:
mms.sunrise.ch. 3600 IN MX 10 mm3.sunrise.ch.
Host mm3.sunrise.ch not found: 3(NXDOMAIN)
So, those sender addresses are invalid, and get rejected on our mail servers. Might want to fix your DNS..
Cheers, Markus