To search you have to:
Examples of valid search strings are:
*** to search for all sessions in the log;
Client session to search for all the client sessions;
@icewarp.com.br to search for all sessions that contain "@icewarp.com.br"
If you right-click a row, you can search for Message ID and see the whole processing of this message. The search time is proportional to the number of results. (Tried with a big log file (50 MB approx. 8000 rows), the search took less than 200ms.) If you right-click a session you will find the Search MessageID function.
There is also a contextual menu in the part where you see the whole session, you can decode base64 strings, copy and select a; you can select a string in the session and if it can be decoded, it will be shown as a hint when you stop moving the mouse.
You can create a Native MySQL DSN with this setup you will get the best response time and you do not need libmysql.dll to connect to the database.