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Re: [Nmh-workers] re repl'ing to msgs with utf-8 From & Subject

From: rader
Subject: Re: [Nmh-workers] re repl'ing to msgs with utf-8 From & Subject
Date: Thu, 25 Oct 2012 13:33:18 -0500

 > >Well, on second thought I don't exactly agree: 1) in reality I often modify 
 > >the
 > >Subject:, which I can't do if they are encoded, 2) I'm guessing down on the
 > >farm almost all mail bits (MTAs and MUAs) will correctly handle plain 
 > >Subject:
 > >headers with raw UTF-8, and 3) down on my farm msgs with RFC2047 headers
 > >actually decode to plain text ASCII--they are only RFC2047 encoded because 
 > >some
 > >Verizon smart phone MUA (or perhaps the email.com MTA) insist on it.
 > You really modify subject headers that often?  I can say that I almost
 > never do that.  Actually, scratch that ... I NEVER do that.

Alas I get a lot of sorta important emails from someone who insists on using a
meaningless Subject.  I change them to something meaningful so inspecting the
msgs with "scan" is meaningful.

 > I would not be so sure about 2) ... I know that Cyrus IMAP used to reject
 > mail messages with headers that contained non-ASCII characters.  And to
 > me the biggest problem is the encoding contains the only place where the
 > character set is listed.  The only times I've seen "bare" UTF-8 is in
 > spam messages.  Maybe it works fine, but at the very least you're going
 > to have character set issues.

This is probably a digression, but FWIW I'm pretty sure raw the UTF-8
non-breaking space (0xa0) and various raw windows-1252 character encodings
(e.g. 0x2e for full stop) are somehow fairly common. 

 > >So I'd like to intelligently decode the Subject: (not duplicate Re:).  Is 
 > >that
 > >possible?  Using...
 > >
 > > Subject %<(decode{subject})Re: %(decode{subject})%>
 > Errr ... it doesn't?  Seems to me like it should.  Well, maybe you shouldn't
 > use %(decode{subject}) as the test ... but it looks like to me that that
 > should work, and I tested it with "ap" and it seemed to do the right thing.
 > And I even tested it in my replcomps and it worked, although the key line
 > in my replcomps looks like this:
 > %<{subject}Subject: Re: %(decode{subject})\n%>\
 > What happens when you try to use it?

Bingo!  Thanks.


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