Re: [Nmh-workers] Re: mh modifies headers? (was Re: Multiple Mailstore

[chad]

On Nov 6, 2009, at 2:37 AM, Marcin Cieslak wrote:
> IMAP has a notion of message flags:
>
> http://deflexion.com/2006/05/server-side-message-labels
>
> One can set \Answered flag on the message via IMAP.
> Mail clients may set their own flags, as there are some standardized.
>
> UW imapd suite maintains flags by having an invisible message at the
> beginning of the mbox folder. I think some IMAP servers maintain
> "Status:" header in the message.

Way back when I still followed this stuff, in the earlyish days of  
IMAP, there
was talk of supporting MH-style annotations via IMAP, and message flags
were more or less the consensus spec answer, but many IMAP servers
did not handle arbitrary message flags, or handled them badly.  I recall
some talk of a capabilities exchange, but I don't remember what ever  
came
out of that -- it's possible that all the important servers these days  
DTRT,
but it's definitely something to investigate before putting serious  
effort into
client support.

*Chad