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5.7.1 is the response code Exchange uses any time a policy blocks a message. If they are using Exchange then they set it up with a mail flow rule action of 'blo
by jabroni_salad 2y ago
5.7.1 is the response code Exchange uses any time a policy blocks a message. If they are using Exchange then they set it up with a mail flow rule action of 'block the message / reject the message and include an explanation'.
- number6 2y agoAm I the only one who thinks this is really thoughtful. Even the error message is good. Brilliant