[Mimedefang] Potential for Business mail servers tonot havereverse DNS

[Kevin A. McGrail]

> By "strict interpretation", I mean "enforce all of these as MUST 
> directives, instead of mere SHOULD directives/suggestions".

I disagree with this statement but would like to have you review the code 
I'm about to post.  RFC's use MUST/SHOULD on purpose and you must not 
reinterpet the should's as must's just because you like it better ;-)

Regards,
KAM