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by megous 1225 days ago
Pretty much.

- Receive new e-mail from MS user at IP X

- Send reply to the same user from IP X

- notice IP is blacklisted, so the email doesn't even end in spam

Great engineering. Users must be excited MS allows them to send e-mail to servers they know are blacklisted, so will not be able to receive the reply from.

Great [honest] engineering would be to just refuse to send the e-mail and tell the user that they are not allowed (by MS) to communicate with this recipient.