how to get remote_addr in ngix for POP/IMAP with perl module

[moorthi]

one more problem is how get original ip in authentication details of
imap-server log instead of nginx server ip.
when i see cyrus authentication log (/var/log/maillog) it shows nginx ip as
client-ip instead of original desktop ip.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,123661,243550#msg-243550