InterScan™ Messaging Security Appliance (IMSA) can take action on an email message based on its total size, including all attachments.
To select message size scanning conditions:
Under Size on the scanning conditions selection screen, select the check box next to Message size is {>, <, =} {size} {MB, KB, B}.
Choose the comparison symbol (>, <, =).
Type a number to represent the number of attachments.
Choose Megabytes, Kilobytes, or Bytes (MB, KB, B).
Continue selecting scanning conditions.
See also: