tcpserver+recordio logging issue

["d tbsky" <tbskyd@gmail.com>]

hi:
   i want to write a simple program to analyze qmail-smtpd session data logged  by tcpserver and
recordio, so i can find out the bounced sender and reason. but after looking at the logged raw data,
i m confused.

the smtp session log start at:
tcpserver: tcpserver: pid xxxxx from xxx.xxx.xxx.xxx

but i can not find a good way to figure out the last log message of  smtp-session.
most smtp sessions log will end like this:
10530 > [EOF]

but some smtp sessions didn't have that "> [EOF]" line.

most smtp sessions will get tcpserver status as last message like this:
tcpserver: end 5048 status 0

but somtimes that message is not the last. like this:
tcpserver: end 5165 status 256
tcpserver: status: 5/40
5165 > 220 xxxxxxxxxxxxxxxx
5165 > [EOF] 

why sometimes "tcpserver: end xxxx status xxxx"  is not the last message of smtp session log?
anyway i can make it  allways the last message?
thanks a lot for your help!!

Regards,
tbskyd