Microsoft to bounce mail from outdated Exchange servers

The Register
Sep 4, 2026, 9:43 am84 ptsTrending
Microsoft is upping the ante on Exchange Server security, warning that outdated on-premises systems will soon be blocked from sending email to Exchange Online. From the second week of September, Exchange Server 2016 and 2019 machines that send email to Exchange Online through an inbound connector of the…

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