🚀 go-pugleaf

manaster@yu1.yu.edu (Chaim Manaster) writes:
>Can someone tell me if there is any significant differences between
>headers on email items and usenet postingd?
I'm no expert, but as part of my experience gatewaying a mailing list to a
newsgroup, I've heard people complain that their mailer crapped out on
certain news headers.  However, reading RFC-822, it appears to me that
mailers are _required_ to accept the possiblity that mail might have new
headers that this particular mailer doesn't know about.

I'm sure Henry Spencer or somebody of that calibre could give a more
definitive answer.  However, the section of RFC-822 that I may be
misinterpreting looks like:

             Individual users of network mail are free to  define  and
        use  additional  header  fields.   Such fields must have names
        which are not already used in the current specification or  in
        any definitions of extension-fields, and the overall syntax of
        these user-defined-fields must conform to this specification's
        rules   for   delimiting  and  folding  fields.   Due  to  the
        extension-field  publishing  process,  the  name  of  a  user-
        defined-field may be pre-empted
 
        Note:  The prefatory string "X-" will never  be  used  in  the
               names  of Extension-fields.  This provides user-defined
               fields with a protected set of names.

Thus, I think that any mailer that chokes on headers it doesn't understand,
rather than ignoring them, is in violation of RFC-822.
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