Op 23-02-2026 om 21:48 schreef Jarland Donnell via mailop:
I just wanted to poke around and ask if anyone else was seeing an
increase in behavior like this today from MS:
451 4.7.650 The mail server [136.175.108.47] has been temporarily rate
limited due to IP reputation. For e-mail delivery information, see
https://aka.ms/postmaster (S775) [Name=Protocol Filter
Agent][AGT=PFA][MxId=11BCD799F8C0D17A]
[DB1PEPF00050A01.eurprd03.prod.outlook.com 2026-02-23T20:36:05.976Z
08DE6BCD08E3CD4A]
I mean, we fight harder against outbound spam than any ESP I've ever
witnessed, to the point that spammers frequently call me a "Nazi." No
significant number of complaints over their FBL, but every one is
actioned. I'll accept if it's just me, but it would be nice to hear
it's not just me.
Yes, same issue here. It seems unfair as the amount of spam coming in
from them is ridiculous. As I already mentioned before, rate limiting
sometimes happen because of spam coming in from them, being forwarded
back to a client mailbox there. Maybe 'too big to block' shouldn't the
case for Microsoft anymore.
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