Google added virus scanning capabilities to their mail service on 2nd dec. As people will know that gmail doesnt allow you to send an exe file as attachment. But even with the virus scan in place you cannot send an exe file (altough there are ways to do it but for common user it will not be easy). Moreover the virus scanning feature cannot be disabled which is useful in case you are sending the infected file to the antivirus support to get help.
People are already complaining about this. To add on google doesnt even tell which company's service they are using to scan the emails. The users would really apreciate that they know which antivirus software is scanning their mails