Adam M. Costello writes:
Arnt Gulbrandsen <arnt(_at_)gulbrandsen(_dot_)priv(_dot_)no> wrote:
Please don't read 822 any more. 2821/2822 are the main current RFCs
Unless you're writing a mail user agent and wondering whether you need
to preserve the upper/lower case information in any of the fields in
a message header. RFC 2822 says nothing about preserving case, but
822 tells exactly which fields do and do not need case preservation
(in section 3.4.7).
I beg to differ. The rules in RFC822 3.4.7 may be complete, but they're
not necessarily descriptive of what a MUA needs to do. Try sending FroM
and see how many receivers choke on it, expecting From. And if I read
it correctly, 3.4.7 says localparts are case sensitive sometimes but
generally not (the grammar notes "case-preserved"). The 3.4.7 rules
don't seem practical for a MUA's addressbook lookup.
I agree that there might be more troublesome omissions in 2822. Is there
a document editor for 3822 yet?
I don't know if that's the only omission; I haven't done a thorough search.
Please post about each and every one as you run across them.
--Arnt