User Manual Part 2

Using VStream Antispam
Chapter 15: Using Antivirus and Antispam Filtering 491
By default, VStream Antispam marks the email as spam.
7. One of the following things happen:
• If the connection is an SMTP connection, the mail server forwards the email
to the recipient.
• If the connection is a POP3 connection, the email client receives the email.
Header Marking
VStream Antispam adds the following headers to each email that is scanned by the Content
Based Antispam or Block List engine, but not blocked:
• X-VStream-Spam-Level. Contains an integer between 0 and 100, where
100 indicates the highest likelihood that the email is spam.
• X-VStream-Engine. The VStream Antispam engine, (either "Content Based
Antispam" or "Block List")
• X-Spam-Level. Contains one to five asterisks, where five asterisks indicates
the highest likelihood that the email is spam.
• X-Spam-Flag. Contains YES if the email is deemed to be spam, according to
the currently configured thresholds.
For example:
X-VStream-Spam-Level: 81%
X-VStream-Engine: Content Based Antispam
X-Spam-Level: ***
X-Spam-Flag: YES
If your email client allows defining rules based on message headers, you can create rules
specifying that emails with certain headers should be moved to specific folders. For
example, you can configure your email client to move all emails with the X-Spam-
Flag: YES header directly to a "Spam Email" folder.