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List:       courier-users
Subject:    Re: [courier-users] esmtproutes ignored while receiving
From:       Sam Varshavchik <mrsam () courier-mta ! com>
Date:       2012-07-01 12:31:13
Message-ID: cone.1341145873.59948.23766.1000 () monster ! email-scan ! com
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Lucio Crusca writes:

> Would it be easy to patch courier myself in order to check esmtproutes for
> incoming mail or make it do something equivalent?
> I do have C and C++ skills, but the question is: how many lines of code would
> be involved in such a patch approx?

For incoming mail, the check is that the domain in the return address is  
valid. Either it is valid, or it is not valid. esmtproutes supplies the
default domain-based destination when sending mail (if the domain is found
its MX records are not even looked up).

You can already set any environment variable, including BOFHCHECKDNS, based  
on the connecting IP address. If all you need to do is disable return  
address checking for connections from fixed IP addresses, just set  
BOFHCHECKDNS in smtpaccess.



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