On 11/10/2023 10:48, Urban Loesch via mailop wrote:
Hi,
same here in north Italy.
Also users on Reddit encounter the same:
https://www.reddit.com/r/sysadmin/comments/1755npg/anyone_else_seeing_outlook_mail_delivery_problems/
That points to an issue in the M365 admin -> Healt -> service status
section where this is mentioned
"
EX680695, Last updated: 11 October 2023 at 11:51 BST
Estimated start time: 11 October 2023 at 01:00 BST
More info: Affected users may see a "451 4.7.500 Server busy" error
message. Current status: We’ve identified that specific IP addresses are
being unexpectedly limited by our anti-spam procedures, causing inbound
external email delivery to become throttled and delayed. We're reviewing
if there have been any recent changes to our anti-spam rules to
understand why the IP addresses are being limited. In the meantime,
we're manually adding reported affected IP addresses to an allowed list
to provide immediate relief."
They're manually adding IP addresses... Sounds a fun job. Just got to
work out how to report them now
Paul
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