[Mimedefang] a way to handle mail from domains with "bad" mx entries?

[James Ebright]

The check against SMTP was recently added to the wiki at:
http://www.mimedefang.org/kwiki/index.cgi?RelayCheckAddresses

I also check for bad HELOs which probably strips most if not all of those
types of relays out (using rfc defined "non-routable" address space... so I do
not know what repercusions you might have (I.E. what broken server software is
out there... like I recently found out you can only check against SMTP for
exchange servers 2003+, guess M$ didn't think it important....) by blocking
these outright.. but it would be fairly trivial to add a check in filter_relay
to catch and reject those.

Jim

On Fri, 18 Mar 2005 12:54:24 -0500, Albert Croft wrote
> I was 
> wondering if there might be a suggested way to check that the MX had 
> not been set to to a host that was unreachable because of such 
> trickery or misconfiguration. Also, if anyone could refer me to 
> additional information on the md_check_against_smpt_server() 
> function, that would also be appreciated.


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