On 23.08.2006, at 16:31 Uhr, Alvaro Herrera wrote:
>> Can you have multi-line subject lines? I didn't think that was
>> possible.
>
> Yes. This is the header of a mail you sent to -patches:
Aha? Subject is an "unstructured header field" and according to RFC
2822 [1]:
----8<--------8<--------8<--------8<--------8<--------8<----
2.2.1. Unstructured Header Field Bodies
Some field bodies in this standard are defined simply as
"unstructured" (which is specified below as any US-ASCII characters,
except for CR and LF) with no further restrictions. These are
referred to as unstructured field bodies. Semantically,
unstructured
field bodies are simply to be treated as a single line of characters
with no further processing (except for header "folding" and
"unfolding" as described in section 2.2.3).
----8<--------8<--------8<--------8<--------8<--------8<----
So they don't contain line feeds or carriage returns and so the can't
be multi-line. If a mail client sends multi line subjects it does
something against the RFC and I assume with that, it does something
wrong.
This is the theory in RFC 2822 as far as I understand it.
cug
[1] http://tools.ietf.org/html/rfc2822
