- 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.
- 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.