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I have a scenario where email is sent through my outbound relay with a do-not-reply 'To:' recipient (the actual recipients are BCCd).

Example of what these emails look like:

From: <[email protected]>
To: <[email protected]>
Bcc: <[email protected]>
Subject: foo

The BCCd recipients should still receive mail, but I'd like to blackhole the attempt to deliver to the do-not-reply recipient, which exists on an external domain. Note that mydomain.com is not hosted by this exim server for incoming mail - this mail server is strictly for relaying.

I attempted a rewrite approach but that would modify the 'To' address that the BCC recipient sees, which looks confusing. Since the do-not-reply recipient is not going to a locally hosted domain, a traditional aliases setup to blackhole the address doesn't work, to my knowledge.

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1 Answer 1

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3

You can use a redirect router. In the routers section of your Exim config file, add the following router:

blackhole_do_not_reply:
    driver = redirect
    local_parts = do-not-reply
    domains = mydomain.com
    data = :blackhole:
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