8 Jun
2016
8 Jun
'16
7:45 p.m.
On 08.06.2016 11:18, Maarten de Vries wrote:
Gmail imposes more strict checks on email coming in over IPv6, with the rationale that IPv6 enabled machines are more modern and thus should be configured properly for newer verification techniques.
Now that is something I totally missed when I read their guidelines, but it certainly sounds like it could be the cause of these problems. I have just switched the server to deliver mails to gmail.com (only that domain, no others) via IPv4. Please tell me if you see any improvement during the next few days.