Procedure

1. Go to Policy → Policy List.
   The Policy screen appears.
2. Create or modify an Other (not an Antivirus) policy.
   • For information on creating a new rule, see Configuring Policies.
   • For information on modifying an existing rule, see Configuring Existing Policies.
3. Under Other, on the Scanning Conditions screen, select the check boxes next to the following:
   • Number of recipients is {>, <, =} {number}: Blocks messages if the number of recipients is less than, exceeds, or is equal to the specified limit.
   • Received time range: Blocks messages if they enter your network within the specified time range.
   • Password protected zip files(unscanned files): Blocks encrypted messages that cannot be decrypted by IMSS.