Using the Sendmail Reject List and Spam Filtering service

The control panel offers two spam filter options - the Sendmail Reject List and Spam Filtering service - that vary in their approach and flexibility in managing spam.

- Note: You do not have to perform any special configuration tasks in the control panel to enable spam filtering capability for your site users. The service is automatically available to your users when enabled for the site by your service provider.

While the Sendmail Reject List enables effortless global control on relay of spam email messages to site users, the Spam Filtering service allows for discretionary management of spam by the users themselves.

# Sendmail Reject List

Email sources that you identify as illegitimate can be blocked from being delivered to any user of the site.

## Advantages

- The Sendmail Reject List allows global control on the relay of email messages to site users. The email sources included in the Reject List are blocked from being delivered to any site user.

- Rejecting spam at the site level correspondingly reduces the scale of spam filtering at the user level. This releases system resources that would otherwise be utilized for scanning.

- Rejecting spam at the site level reduces the risk of email viruses infiltrating the network.

# Spam Filtering service

While the Sendmail Reject List only allows rejection of spam email messages, the Spam Filtering service allows discretionary management of spam.

## Advantages

The Spam Filtering service allows flexibility in controlling and managing spam. The User Administrator can review the email messages and choose to delete spam messages, have them delivered as an attachment, or quarantine them in a spam folder.

## Disadvantages

Filtering at the user level introduces security risks posed by email viruses.