MailLog plugin distinguish between simultaneous logins

[azurit at pobox.sk]

Citát Aki Tuomi <aki.tuomi at open-xchange.com>:

> On 7.11.2018 16.13, azurit at pobox.sk wrote:
>> Hi,
>>
>> is it, somehow, possible to distinguish between multiple simultaneous
>> logins in MailLog plugin? For example, which login deleted which
>> message. Is that p[lugin able to log e.g. session ID?
>>
>> azur
>>
>>
> mail_log_prefix = "%s(%u)<%{pid}><%{session}>: "
>
> Aki



Thank you but it doesn't work for me. Which Dovecot version do i need?  
I'm using 2.2.34.