When emails sent by b2evolution cannot reach their destination (wrong address, mailbox full, rejected as spam) they will be returned to the Return-Path address you specified.
This task will connect to that mailbox through IMAP and extract useful information from the returned emails in order to mark the email addresses as having problems.
This will avoid continuing to send messages to email addresses that reject them.
If you want to read more details about how this feature works, please visit: Return-Path Configuration
Created by • Last edit by on Dec 06, 2013
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