Re: Intent to revive "expires" header from draft-ietf-mailext-new-fields-15

Charles Lindsey writes:
> Yes, but that all changed when the IETF agreed to standardize POP3 and 
> IMAP, which are clearly "message stores",
> ...

I think that if you look at little more closely at IMAP, you will find 
this assumption to be incorrect.

IMAP specifies many things, very few of them are about the message store 
itself. Most of what IMAP has to say is about how the client talks to 
the server and vice versa. The message store is a gaping area of 
unspecified behaviour (intentionally, and it has both positive and 
negative effects).

RFC 3501 section 5.1.1 regulates how mailbox hierarchies behave, surely 
an important part of how a message store works. Guess how much text and 
how many MUSTs that involves.

Arnt