[Mimedefang] Re: Net::DNS module for DNS lookups

Kelson Vibber kelson at speed.net
Wed Jul 9 12:21:01 EDT 2003

Dave Shepherd <Dave.Shepherd at Vixel.com> wrote:
>If a message is From: friend at ibm.com then shouldn't it be arriving from 
>some system at hostname.ibm.com ??

In the case of IBM, probably.  In the case of friend at smallcompany.com, it's 
more likely to be from a system at hostname.someisp.com.

Additionally, if someone sends work-related email from home, the server 
they use may have nothing to do with the MX record at all.

>What the effects would be if I rejected email in these cases.

You'd block a whole lot of legitimate email.

Kelson Vibber
SpeedGate Communications <www.speed.net> 

More information about the MIMEDefang mailing list