Re: [exim] Forwarder destination is bogus, how to reject in …

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Author: Andrew
Date:  
To: exim-users
Subject: Re: [exim] Forwarder destination is bogus, how to reject in the acl_smtp_rcpt?
Phil Pennock wrote:
> On 2009-10-03 at 11:12 +0930, Andrew wrote:
>> Mike Wilson wrote:
>>> Consider this case, I am running a mail server for my domain
>>> example.com. I have a redirect router that checks out /etc/aliases. In
>>> that file one of my users has created a forwarder to an email address
>>> that doesn't exist. I would like to be able to detect this at SMTP
>>> time and reject it instead of having to generate a bounce. But a
>>> simple
>>>
>>> verify = recipient
>>>
>> All this does is check to see if the recipient domain is able to have
>> email delivered to do it, using DNS records.
>
> No.
>
> For *remote* domains, it only checks if there are DNS records. For
> addresses handled locally, it verifies that the recipient can be
> delivered to. I'm simplifying slightly by implying that this
> distinction is by domain; it usually is.


Sorry, I am well aware of of this, I was just being a bit too
simplistic, I'll keep this in mind for future answers.

>
> It's worth reading chapter 3 of The Exim Specification (spec.txt with
> Exim or online at www.exim.org).
>
> -Phil



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