On 29 March 2023 13:53:59 "Gellner, Oliver via mailop" <mailop@mailop.org>
wrote:
I'm not sure what is meant by EOL
In this context, Exchange Online.
I understand the "eventually", but for now it's only applying to their
closest customers.
At work I already have some small scoring rules in place that identify
emails with received headers that hint at decade+ out of date MTA installs
but take no action on them. They're just one more indicator of the
trustworthyness of the source of the email.
If an organisation is still using something like Exchange 5.5, then the
likelihood of the emails coming through it being malware is pretty high.
On the one hand, we as an industry curse and spit at MS for a number of
things. Let's not do that when they're doing something which is actually
fairly useful!
Graeme
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