Advisory: Sophos Endpoint - "Your connection isn't private." We're aware of a certificate issue and are actively working to resolve it. Please see: KB-000045954 for the latest updates.

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Sophos filtered Email to M365 - Microsoft then removing legit emails as High Confidence Phish

We have many clients on Sophos filtering of email before delivery to m365

Yesterday we had several clients, where the email was "removed" (after delivery) from their inboxes and taken back to M365 quarantine as a "high confidence phish"

Essentially it was very much (all) the emails that contained a URL

I'm wondering if the Sophos modification of those URL's at the spam/virus filter end (safe links) prior to delivery, is upsetting "something" at M365 and what do we need to do to fix it?




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