Question : Cannot get to Bitdefender/ McAfee/Symantec/Microsoft websites

But I can get to everything else.  I have scanned for viruses and removed some minor ones.   I can ping the site www.bitdefender.com by address or name.   I can run a tracert to it but I cannot browse to the name.   It takes 10 minutes to browse to the IP address.   (the same holds true for the other sites).   I have a server connected right next to it and it browses fine.    I am not sure how to track down what it is breaking.   I even put an external DNS address in as one of the servers DNS addresses.   No difference.   Where should I start?

Answer : Cannot get to Bitdefender/ McAfee/Symantec/Microsoft websites

which version of exchange is this please?
Could you check your send connector to see if it is sending mail directly (DNS lookups) or sending it to a 'smarthost' (the sophos box)

If its sending to a smarthost (sophos IP) just change it to direct DNS and it will bypass the box completely.