Exchange anti-spam features and antivirus feature configuration

Configure anti-spam features

N Spam is an e-mail message that is forcibly sent to a user's mailbox without a user's permission

N Junk e-mail has the following characteristics:

U recipient has not made a request or agreed to receive in advance

U recipient cannot reject

U Hide Sender's identity, address, title, etc information

U contain false information source, sender, routing and so on.

Exchange anti-spam features

N Exchange 2007 has a variety of anti-spam features built in to protect users from spam

N Exchange 2007 junk e-mail filtering method:

U Connection filtering

U Sender Filter

U recipient filtering

U content filtering

Use connection filtering to block junk e-mail

n After you configure connection filtering on Exchange, connection filtering filters messages that are passed based on a predetermined list of IP addresses

Pre-defined IP address lists include:

N administrator-defined IP Allow list and IP Block list

N IP Block List provider

N IP Allow List provider

To block junk mail by using connection filtering:

N Configure the IP Block list (add a blocking address to the IP Block list, verify the IP Block list)

N Configure IP Block List providers (configure DNS servers, configure IP Block List providers, verify connection filtering)

Use sender filtering to block junk e-mail

n Sender filtering depending on the SMTP message header (which contains information such as the sender's IP address, send time, letter mailbox, Inbox, and so on) determines the action to be performed on the inbound e-mail, the administrator can block a single sender, an entire domain or domain, and all child domains

To use sender filtering to block junk mail steps:

N Configure Sender Filtering

N Verify Sender Filtering

Using recipient filtering to block junk e-mail

n Recipient filtering determines what actions are taken on inbound messages based on the SMTP message headers, enabling recipient filtering to directly reject messages sent to the specified mailbox

To use recipient filtering to block junk mail steps:

N Configuring Recipient Filtering

n Verifying recipient filtering

Use content filtering to block junk e-mail