Re: SUMMARY: Limiting msg-id generate syntax

On Tue, 8 May 2007, Arnt Gulbrandsen wrote:
...
>>> I'd also be inclined to *not* talk about case-sensitivity and comparisons 
>>> since nowhere is it discussed in 2822.
>
> Agree. I can't even think of a way to count what the running code does.

There are two places it matters: in the copying of message-ids for replies 
and in the implementation of threading algorithms.

If a MUA generating a reply were to try to 'clean up' the message-ids in 
the parent that use the obsolete syntax (because it wants its reply to 
match the generate syntax), then the MUA needs to only strip CFWS and 
tweak quoting and not get carried away and normalize case too.

On the threading side, well, draft-ietf-imapext-sort-18 says
                    Note: Message ID comparisons are case-sensitive.
so this issue is covered from that angle.  Actually testing threading 
implementations outside of IMAP would be laborious...


Philip Guenther