ability to disable shared namespace?

[Wesley Craig]

Isn't this what "foolstupidclients" does?  I think Blackberry might  
meet the criteria...

:wes

On 13 Feb 2010, at 18:38, John Madden wrote:

> I wrote a couple months ago about "proxyd high cpu usage" and the  
> problems scanning large mailbox spaces just to see if anything is  
> available causes us.  I worked around the issue by hard-coding the  
> namespace IMP uses rather than letting it detect it from the  
> server.  Unfortunately, that only fixes one IMAP client.   
> Blackberry users are causing havoc though, thousands of them  
> remaining connected all the time and their mail checks coming in  
> waves that drive load averages on frontends over 300.
>
> I'm wondering if there is support anywhere for hard-coding the  
> namespace clients see.  We don't use shared folders (impractical  
> with 400k users anyway) so it would be nice to just turn that  
> functionality off or at least hide it.  Can it be done?  I'm can't  
> use altnamespace at this time (affects the clients).   
> Unfortunately, the problem is bad enough that I'm "this close" to  
> writing an imap proxy that supports client-side SSL that will allow  
> me to tweak the do this on the fly.