Re: [exim] Verifying recipient confusion

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Autor: Lena
Fecha:  
A: exim-users
Asunto: Re: [exim] Verifying recipient confusion
> From: Terry

> I thought I had a handle on what I was doing in
> rejecting mail to unknown users but a discussion on another list and
> subsequent googling made me question it.
>
> I have the following in acl_smtp_rcpt:
>
>    require
>      message = 550 5.1.1 Bad destination mailbox address
>      verify = recipient


I advise without "message", then error messages will be more specific.
For incoming mail (to local domains) to nonexistent users
a router should generate message like "Unknown user",
it'll be what sending MTA sees. Please post your such router.

> I ran across an entry on the exim wiki on recipient verification.
> https://github.com/Exim/exim/wiki/Verification#recipient-verification
>
> Recipient Verification
> Drop at connect time if the Recipient doesn't exist.
> deny    message   = REJECTED - Recipient Verify Failed - User Not Found
>          domains   = +all_mail_handled_locally
>          !verify   = recipient/callout=2m,defer_ok,use_sender


Recipient callout for domains handled locally (for incoming mail)
makes no sense and is not performed, the "callout" is ignored.
"callout" in "verify=recipient" is for outging mail (to remote domains).