MailChannels / cPanel Suspend Email Check

We discovered that the use of MailChannels on our servers for outbound email spam detection was causing cPanels recently added feature for suspending outbound email for specific customers to not function and email was still being delivered. After some playing around I was able to correct this matter by adding into the exim configuration, just above the mailchannels router, the following section:

        driver = redirect
        condition = ${perl{check_outgoing_mail_suspended}}
        data = :fail: outgoing mail suspended

Once added, restart exim and test to see that emails should now be being bounced back to the sender.

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