how to find the trojan or botnet

Hi Experts,

I have seen our IP address is listed at CBL and we cannot send emails with our domain.
Do you know a way how to repair this and find the trojan or bot net ?

 This was detected by a TCP/IP connection from 85.125.249.50 on port 50429 going to IP address 82.165.37.26 (the sinkhole) on port 80.

The botnet command and control domain for this connection was "uwet35fsd.in".
Eprs_AdminSystem ArchitectAsked:
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David AtkinConnect With a Mentor Technical DirectorCommented:
How  many PC's do you have?

Check your router/firewall to see if you can see what internal IP addresses are connecting to the external address.

Check to see what PC's are sending emails by looking at the firewall connections or by doing a netstat -a on the PC's (look for lots of port 25 connections)

Make sure your server is not an internal relay by using the mxtoolbox.com SMTP test.
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Eprs_AdminSystem ArchitectAuthor Commented:
thanks a lot.
the tool is very helpful.
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