I’m starting to get complaints about external emails being rejected with the error: Remote host said: 454 4.7.0 Connection is not TLS encrypted. Recipient organization requires TLS.

This appears to have started on 6/27/2024. I haven’t made any recent changes, so it seems like a change on Microsoft’s end?

​I’m starting to get complaints about external emails being rejected with the error: Remote host said: 454 4.7.0 Connection is not TLS encrypted. Recipient organization requires TLS. This appears to have started on 6/27/2024. I haven’t made any recent changes, so it seems like a change on Microsoft’s end?  Read More

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