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Enabling Virus Screening
Before you can benet from mail screening, it must be enabled. While enabling
screening, you congure screening parameters.
Mac OS X Server uses ClamAV (from www.clamav.net) to scan mail messages for
viruses. If a suspected virus is found, you can deal with it several ways, described
below. The virus denitions are kept up to date (if enabled) via the Internet using
a process called freshclam.
To enable virus screening:
1 In Server Admin, select a computer in the Servers list, then select Mail.
2 Click Settings.
3 Select the Filters tab.
4 Select Scan Email for Viruses.
5 Choose from the following to deal with junk mail messages.
 Bounced: Sends the message back to the sender. You can optionally send a mail
notication of the bounce to a mail account (probably the domain’s postmaster)
and notify the intended recipient.
 Deleted: Deletes the message without delivery. You can optionally send a mail
notication to a mail account, probably the postmaster, as well as the intended
recipient.
 Redirected: Delivers the message to a designated address for further analysis.
6 Choose if you want to notify the intended recipient if the message was ltered.
7 Choose how often to update the virus database.
A minimum of twice a day is suggested. Some administrators choose eight times a day.
8 Click Save.
38 Chapter 2 Mail Service Setup