Re: Unpacking insecure arcmail
  By: Markus Reschke to mark lewis on Tue Mar 17 2015 14:16:38

 MR> Current practice is to strip SEEN-BYs at zone and domain gates since
 MR> their 2-D nature make them useless for duplicate message checking beyond
 MR> a given zone.


 MR> The hpt documentation has a section about zone gating under "4 Advanced
 MR> Concepts in HPT".

I think that current practice no longer strips SEEN_BYs.  There are no longer
any duplicate nets since I disolved the last one as far as I know.
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