I have an trouble with Barracuda ESG. My customer ask me have to block all email that send to their mail server too recipients. For Example, With Inbound traffic. from a gmail account try to send our domain a mail spam. They send to 30 user account in my domain (may be send directly,cc or bcc). How can i block this email. and how can i create rule with 30 recipients send to our domain from outside domain. Barracuda can block it.
Please help me resolve it if this product can do it