Yes this is an updated hosts file you place in :
C:\Windows\system32\drivers\etc Rename your hosts file to 'original hosts' then place this into that folder.
Then you will need to do a dns flush
Start > Run then type 'cmd'
Then in the dos box type 'ipconfig /flushdns'
Then restart MX,, keep in mind the hosts files are not as fast as the .dll is, but should get you connected until the .dll is resolved.
thanks..