[Email-SIG] Append behavior of __setitem__
Stephen J. Turnbull
stephen at xemacs.org
Sat Apr 11 09:43:56 CEST 2009
Barry Warsaw writes:
> So I'm just starting to read RFC 5322 and I'm starting by skimming
> over Appendix A (differences between RFC 5322 and 2822).
I know Barry's a big supporter of the Postel Principle. As a
guideline, how far back should we be lenient? RFC 822 (no leading "2"
 Presumably over time we'll accrete definitely non-conforming
practices that we need to accept and do something sane with (eg, we
can't just raise ArmageddonException because we get a header with
8-bit characters in it). But I think we also should have a plan for
formerly acceptable syntax that has been restricted in more recent
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