Forum Discussion
Marking External Email with an Exchange Transport Rule
This topic has been discussed before, but I think it's worth looking at again because of the growth in phishing and the need to dial-down the effect of email transport rules with exceptions to make r...
hmm, i thought there's a separate forum for O365?
There is, but what's your point? This topic is about using an Exchange transport rule to warn recipients about external email that might be dangerous. Transport rules are supported both in the cloud and on-premises versions.