Re: Slow expiry with nnimap+Courier [patch]

[Jouni K Seppanen <jks@iki.fi>]

Simon Josefsson <jas@extundo.com> writes:

> "Ted Zlatanov" <tzz@lifelogs.com> writes:
>> Can we set it on automatically if the server tells us it's a Courier
>> server?  Mine does in the first OK response, right after connecting.
>
> Yes, I don't see how that would hurt anyone, except potentially
> Courier users.  Some code to detect that it is the Courier server and
> to set the variable would be needed, though.  Do Courier support the
> ID extension?  There is support for ID in imap.el.

At least the version I'm using doesn't support ID, so we'd have to
look at the first OK response. In my case it looks like this:

* OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE AUTH=PLAIN ACL ACL2=UNION] Courier-IMAP ready. Copyright 1998-2004 Double Precision, Inc.  See COPYING for distribution information.

By the way, RFC 2971, which defines the ID extension, specifically
forbids using it to work around bugs or to optimize for a particular
client or server, with the rationale that the extension must not
"supplant IMAP's CAPABILITY mechanism with a ad-hoc approach". 
(So the standards-compliant way to do this would be to ask the Courier
developers to advertise a "X-SLOW-UID-SEARCH" capability so we can
detect it in Gnus?!)

-- 
Jouni K Seppänen