Any legitimate customer on *.onmicrosoft.com add an alias with their real
domains. Real customer emails will have real domains in the Microsoft
service.
There is essentially no legitimate email with
<randomletters>.onmicrosoft.com sender domains. Microsoft has made a
business decision,
There appears to be no problem with blocking *.onmicrosoft.com
On Wed, 20 Mar 2024, Robert Giles via mailop wrote:
Seeing this type of stuff quite a lot originating from legitimate
Microsoft infrastructure, and their abuse desk never seems to take any
action; I suppose dropping any *.onmicrosoft.com envelope-from is
probably the right course of action here?
From: Makita 6-pc Combo Kit Department
<tdycteiqkhwzsqvufjjirdssgsweqfhojtjpnzldvvgjaoa.v0fpgnyfjxscf0uw7krp...@escolalabourecat.onmicrosoft.com>
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