User guide

Using VStream Antispam
Chapter 15: Using Antivirus and Antispam Filtering 527
IP Reputation
Content Based Antispam and
Block List
Detection Method Examines the sender's IP address Content Based Antispam examines the
email's content, and Block List examines
the email's Sender field.
SMTP Error Message Does not return an SMTP error
message to the email sender
Returns an SMTP error message to the
email sender
Mail Rejection
Method
Resets the TCP connection Marks the email Subject line, marks the
email header, rejects the email (SMTP
only), or deletes the email (POP3 only)
Server Overload
Protection
Prevents spammers from
overloading gateway and mail
server resources
Does not prevent spammers from
overloading gateway and mail server
resources
Important: In order to use VStream Antispam, your Safe@Office appliance must be
subscribed to a Service Center.