identify MUA connecting?

[Aleksandar Lazic]

Am 29-07-2014 09:08, schrieb Frank Elsner:
> On Tue, 29 Jul 2014 00:49:37 +0200 Reindl Harald wrote:
>> 
>> Am 28.07.2014 22:40, schrieb Peter Chiochetti:
>> > Am 2014-07-28 um 21:15 schrieb Reindl Harald:
>> >> Am 28.07.2014 20:57, schrieb Rick Romero:
>> >>>> Am 28.07.2014 19:58, schrieb Juan Pablo:
>> >>>>> The reason I am wanting to do this is I would like to know if people
>> >>>>> are getting their email on personal devices
>> >>>>> instead of work secured / standardized phones
>> >>>
>> >>> IMHO, client certificates would work work well here.  I think Dovecot
>> >>> supports it
>> >>
>> >> yes, but you accept them or not
>> >> that's a different story than "log the MUA information"
>> >
>> > Yes, it is a means to stop people from using insecure devices.
>> 
>> a client certificate hadrly makes a device secure
>> if the device is compromised your cert is gone
>> 
>> > So possibly a useful hint the OP may be interested in! Might well be that
>> > its the reason for learning which MUA was used?
>> 
>> well, "what client is used" is impossible
>> 
>> there is no user-agent like HTTP and even for HTTP the header is not
>> mandatory and rqeuire it will break your web-app for anybody who cares
>> for privacy while gain nothing
> 
> Not in general:
> 
> cyrus/imaps[9143]: client id: "name" "Thunderbird" "version" "24.6.0"
> 
> I guess, dovecot simply must learn it.

But this depend on if some Mailheader (X-mailer, User-Agent (k9), ...) 
are set.
I'm sure this could be logged with sieve.

I haven't seen a option on http://wiki2.dovecot.org/Variables for normal 
dovecot log, maybe there is one.

Cheers
Aleks