http://sc.mynetwatchman.com/seccheck/SubmissionStatus.jsp?submissionID=6ff3273827ef12bef0b3ecc25043b6cb

Dear experts:

I am a Costa Rican entrepreneur that among production, sales and finances ALSO handles our companys IT needs. I am certainly a beginner when it comes to this things.

Our e-mail has been blocked by at least 3 "Black List" companies according to the DNSStuff.com Spam Database Lookup report.

We did have a lot of Viruses last week, but since then our Antivirus has been properly updated and it has cleaned fairly well our network stations. The following viruses were detected and cleaned: W32/Checkout, Downloader-UA.h, PWS-LegMir.gen.k, Downloader-UA, Generic!atr

I still get a Buffer Overflow detection by the McAfee Antivirus 8.5.0i, Patch 6, in 3 machines. However, the antivirus does not seem able to get rid of it's cause. The above URL is the report for one of those PCs.

At this time my biggest concern is not being able to send any mail from our server. This Buffer overflow issues are not a problem at present time.

My question is: Do you see any infection in the report? What steps should I take to further clean this machines?

I have already contacted the 3 organizations that have our IP listed as a Spam Bot server and request our removal from their lists. Any advise on other actions I should take?

Thank you very much for your help!!