qmail Count Login

[xooops]

Hi

I have Problem on my Server (7.5.4)

Some f.. SPAMER or Virus sends a lot of messages out from my server.
How can I count the Users login to see witch user have the most loggings?

Thanks, Sven

 

[xooops]

at the moment run tail -f /var/log/mail.info | grep "new msg" to show all new outgoing mails

can I run a command to show the succesful stmp login?

many thanks, Sven