postfix logs format

Hi, can anyone help me interpret the components of this postfix log format? I am trying to use it for AWStats mail analysis..

…..”
%time2 %email %email_r %host %host_r %method %url %code %bytesd %others
And this is a sample of records AWStats found in your log file (the record number 50 in your log):
Jul 4 04:12:53 hostname postfix/nqmgr[792]: E6CF753D88: from=, size=1727, nrcpt=1 (queue active)
….”

Many thanks