if the joker has arranged an SPF record at  #ha*&(!LN.com  I'm all for accepting
mail from him.

The disadvantage of making the test more complex is simply that the complexity
is needless.  A meaningless edge case that does no harm is being categorically
ruled out.

When e-mail addresses (and this has already occurred i believe) start including
unicode, when dns starts including unicode, to work with the extended
possibilities
addresses wil have to match all kinds of strings that would nonsense.

I think the best approach, and I don't have any standing here so I may
be talking
nonsense, is to accept anything and then munge it so it doesn't
interfere with the
internal formatting.  Something like

  ($userpart, $domain) = $rcpttoline =~ /<([EMAIL PROTECTED])\@([^\>]+)/
     or DENY(501,"please enclose [EMAIL PROTECTED] address in <angle brackets>");

  $userpart =~ s/\W/sprintf '#%X#',ord $1/ge;
  $domain =~ s/[^\w\.\-]/sprintf '#%X#',ord $1/ge;




-- 
David L Nicol
getting even worse at mindreading as I get older

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