SMA is a program that analyses sendmail log entries.
The key features of SMA are 
      Fast (written in C) 
      Portable 
      Free (BSD-style licensing) 
      output as HTML or ASCII. 

SMA features 
      Support for all recent sendmail versions (UNIX/NT) 
      Flexible output formatting - HTML, ASCII and Custom Log 
      Regular expression filtering of messages 
      Multiple hosts in a same report 

WWW: http://www.klake.org/sma/