Hey Dijesh,
From what I can see; we cannot get this information readily on the ESA via the GUI or CLI.
To do this would require some checks inside the mail_logs or so for specific log lines, then running a grep against it:
EG:
grep "Start MID.*ICID 0 (ISQ Released Message)"
Then this yields:
Wed Nov 13 10:41:56 2019 Info: Start MID 403511 ICID 0 (ISQ Released Message)
Where if you grep the MID here you will get the sender.
Another log is euq_log
This will give you the recipient IDs of released emails, rather than the sender.
example:
--
Info: ISQ: Released MID 403421 to 1676@cisco.com
Regards,
Mathew
