[Dovecot] mail_max_userip_connections

[Oscar del Rio]

On 03/13/13 05:37 AM, Simon Brereton wrote:
> On 12 March 2013 18:03, Axel Luttgens <AxelLuttgens at swing.be> wrote:
>> Le 12 mars 2013 à 17:18, Simon Brereton <simon.buongiorno at gmail.com> a écrit :
>>
>>> [...]
>>>
>>> I suppose this implies it's the webmail client.,
>> So, to be sure: the webmail server is running on the same box as the one running Dovecot?
> Si.  Yes.
>
>>> but even having that
>>> open on two different machines shouldn't open 10 connections.  Should
>>> it?
>> I tended to believe that usually, a webmail application tends to open/close connections sequentially, or to consecutively select relevant mailboxes within a single connection. But who knows...
>> Which webmail app have you installed?
> I believe that as well, especially as I don't have tons of folders
> (some of my users do).  I'm using Horde.

Try imapproxy for Horde.  It would keep a single connection to Dovecot 
open during a webmail session.
http://www.horde.org/apps/imp/docs/PERFORMANCE

Since Horde and Dovecot are on the same server, you can configure 
imapproxy on a different port, e.g. 1143.
Horde -> imapproxyd (port 1143) -> Dovecot (port 143)