Why “Reject recipient” event is logged when it was a sender rejection?
This is specific to the Before Arrival filtering point. ORF builds into the SMTP connections (the transfer protocol of emails) and monitors specific protocol events. The Before Arrival filtering is performed when the sender server tries to specify the recipient(s). On this event, ORF performs the tests assigned to the Before Arrival filtering point and if the incoming email fails on the tests (e.g. the sender email address, the connection IP address or the recipient is blacklisted), it rejects the email recipient. So it is not actually the email rejected, it is the recipient. The On Arrival filtering point actually deals with the email, so it uses the “email” terminology. An email may have multiple recipients, so the rejection of a single recipient may not result in rejecting the entire email.
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