Wietse Venema via Postfix-users:
> Steffen Nurpmeso via Postfix-users:
> >  |Verified with 
> >  |
> >  |    postmap -q - 
> > 'pipemap:{regexp:rcpt-bcc.regexp,regexp:bcc-generic.regexp\
> >  |    }'
> >  |
> >  |for quoted and unquoted localparts.
> > 
> > And partially quoted?  I have a bit of problems with ABNF, so
> 
> Postfix transforms envelope addresses to unquoted internal form
> upon message arrival, and quotes the entire localpart (if needed)
> to external form before table lookup.
> 
> For example, the following quoted input forms:
> 
>     wietse ven...@example.com
>     "wietse venema"@example.com

Something removed a backslash.
 
     wietse\ ven...@example.com
     "wietse venema"@example.com


> both become the same table lookup key:
> 
>     "wietse venema"@example.com
> 
> Why does Postfix do that? Because Postfix policies would
> be trivial to evade otherwise.
> 
> A similar thing happens when rewriting header addresses,
> except that the unquoting happens later.
> 
>       Wietse
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