[Dovecot] Logging question regarding delete actions

[Ralf Hildebrandt]

A user is logged in via imap from multiple devices.
The log has this:

Sep 21 11:46:32 postamt dovecot: imap(awxxxxer): delete: box=INBOX, uid=15347, msgid=<1341851741.4ffb085d2e2b7 at swift.generated>, size=15675
Sep 21 11:46:32 postamt dovecot: imap(awxxxxer): delete: box=INBOX, uid=15739, msgid=<b23b2e42f6ae9ba1602690be42b7b5c7.squirrel at webmail.charite.de>, size=18134
Sep 21 11:46:32 postamt dovecot: imap(awxxxxer): delete: box=INBOX, uid=15740, msgid=<3509D8B3F9054C4BB26C85F3E4B96563036822877538 at EXCHANGE21.charite.de>, size=22226
Sep 21 11:46:32 postamt dovecot: imap(awxxxxer): delete: box=INBOX, uid=15741, msgid=<C2E306F4-8622-4D0F-98BD-C67F31F2FF08 at charite.de>, size=5160

How can I find out WHICH CLIENT caused the deletion?

Same issue:

Sep 21 09:36:05 postamt dovecot: imap-login: Login: user=<awxxxxer>, method=PLAIN, rip=109.45.0.37, lip=141.42.206.36, mpid=30773, TLS, session=<e8TfSjHKgwBtLQAl>
Sep 21 10:06:17 postamt dovecot: imap(awxxxxer): Disconnected for inactivity in=2255 out=4398

How can I be sure that the log entry from 10:06:17 "belongs" to the
log entry from "09:36:05"? Also, what is the meaning of the
"session=<e8TfSjHKgwBtLQAl>"?

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de