I was thinking about this LF replacing CRLF issue recently when I was
implenting some code to PGP sign e-mail. Basically if you send the mail from
Windows it will produce the hash of the message which includes the CR but
when you recieve it the CR have been removed and thus the hash is taken to
be bad. Anyone got any thoughts on this?
IMHO the body of a message should never be changed.
Andy
> -----Original Message-----
> From: Philip Hazel [mailto:ph10@cus.cam.ac.uk]
> Sent: 25 January 2002 09:14
> To: John Holman
> Cc: Ken Murchison; info-cyrus@???;
> exim-users@???
> Subject: Re: [Exim] Cyrus/Exim incompatibility
>
>
> On Thu, 24 Jan 2002, John Holman wrote:
>
> > My guess is that there is no real standard, but I think it
> makes sense when
> > passing a message to an MTA via stdin to comply with the
> conventions of the
> > local operating system. That would mean LF under Unix, CRLF
> under Windows etc.
>
> This seemed to me to be obvious, and not even worth thinking
> about, when
> I first implemented Exim. Clearly it isn't as obvious to some people.
>
> I added the -dropcr option in a hurry later, to help out
> someone who had
> this problem. It was done the way it is ("throw away ALL CRs") because
> that is trivial to implement, whereas "throw away ONE CR if
> it precedes
> LF" is more complicated. Besides, I was a a bit grumbly about it.
>
> > Actually, if it's true that there are no standards to be
> upheld, I also
> > think it would be better for Exim (which claims to be a
> Sendmail clone
> > insofar as the command line interface is concerned) to
> accept either CRLF
> > or LF as a line terminator when mail is presented on
> standard input, if
> > that is what Sendmail does.
>
> I never claimed it to be a clone! It tries to implement the
> majority of
> commonly-used command line options in a compatible way.
>
> Cyrus appears to be becoming widely used. I should probably
> do something
> better in Exim 4. I will investigate changing -dropcr to make it mean
> "turn CRLF into LF" instead of what it currently does, and I will also
> add a configure file option to force it always to be on. (And I'll see
> if I can find any Sendmail documentation on this subject.)
>
> Philip
>
> --
> Philip Hazel University of Cambridge Computing Service,
> ph10@??? Cambridge, England. Phone: +44 1223 334714.
>
>
> --
>
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