Recent (probably MacOS) mail app provoking endless cyrus.index writes on 2.3 server. [WARNING: DKIM validation failed]

[ktm at rice.edu]

On Thu, Oct 22, 2015 at 10:32:40AM -0400, bacon wrote:
> Apple released OS 10.11.1 update yesterday.  It shows that it includes,
> 
> - Fixes an issue where outgoing server information may be missing from 
> Mail
> - Resolves an issue that prevented display of messages and mailboxes in 
> Mail
> 
> Does anyone know if this fixed the problem.  I've asked my users not to 
> use Mail on El Capitan until this bug is fixed.
> 
> Meanwhile, I'm working in my spare time to upgrade my cyrus-imapd on 
> RedHat Enterprise Linux 6 from the 2.3 series distributed by RedHat to 
> the 2.5 series which I'll have to build and maintain myself.  That's an 
> ugly job and one that I don't really want to do.
> 
> Fred
> 

Hi Fred,

It does not appear to have addressed the problem. We are trying to gather
more information.

Regards,
Ken