That sounds very strange for sure. I’ve not heard anything from others about
problematic CSS listings (and the 9am thing is weird). Are they accompanied by
DBL listings or are they just the sending IPs? The standard with CSS-style
listings is there is a problem with your address collection proce
On Sat, Mar 12, 2022 at 02:31:14AM +0100, Ángel via mailop wrote:
> E.g. your email arrives to the on-premises MTA, which not finding a
> local user passes it to Office 365 who doesn't have that either so it
> is sent again to on-pre
But this is a real mail loop. One system needs to be authoritat
