Outlook and IMAP IDLE

Jeroen van Meeuwen (Kolab Systems) vanmeeuwen at kolabsys.com
Thu Feb 3 14:39:38 EST 2011

Sébastien Michel wrote:
> Our clients ask us to open IMAP (previously mostly POP and Webmail access)
> for their customers.
> The impact is significant on I/O, specifically when IMAP clients poll to
> ask for new messages.
> Most of their customers use Outlook Express (Windows XP) or the new Windows
> Mail (Vista and Seven).
> The impact of Outlook Express on I/O could be reduced thanks to IMAP IDLE.

I wasn't aware Outlook Express is still supported?

In any case, I very much doubt it is worthwhile fixing this on the server 
side, as some sort of nasty workaround for broken clients. Once we start going 
that route, none of the clients that pretend to be able to speak IMAP will 
have to actually be anywhere near compatible with the IMAP specifications.

That said, however, if it is worthwhile, and somebody decides to provide a 
patch to fix it, I'm not going to stop anyone from doing just that! ;-)

Kind regards,

Jeroen van Meeuwen

Senior Engineer, Kolab Systems AG

e: vanmeeuwen at kolabsys.com
t: +316 42 801 403
w: http://www.kolabsys.com

pgp: 9342 BF08
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