Hmmm
I don't see why this would stop the mails coming in, unless it thought they were spam. Check your spam folder in your email client. Also, if you know the mail address the mails used to come from, ensure it's added to your safe senders list. There may be some mail specific settings in the virus software you need to check, but I presume you are getting other mails as normal.
Can you send mail to yourself from this site? Does that come through?