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In cpanel, if I do not set up "Domain Fowarding", a 550 "No Such User" bounces email to non-existent email addresses on my domain.

If I do set up Domain Forwarding, email to a non-existent address is forwarded to the mailbox I designate in the Domain Forwarding.

I would like to use Domain Forwarding, but set up specific addresses to reply with 550 No Such User. How can I achieve this in cpanel?

The goal is to bounce mail to addresses that have become spam targets, while having a "catch-all" address for all other mail.

Thanks.

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Ok, this seems to be as simple as (after setting up Domain Forwarding), adding a forwarder for the specific address we want to bounce, and, instead of selecting a mailbox to forward to, selecting "fail" with a configurable message that defaults to "No such person at this address."

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    When you are allowed, please accept your own answer to help others in future.
    – Steve
    Aug 11 '21 at 1:37

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