User manual

Milter Mode

Avira GmbH Avira AntiVir MailGate 12

3.2 AntiVir MailGate (Milter Mode) Features

AntiVir MailGate (Milter mode) is a plug-in for Sendmail, starting with version

8.11, and communicates through Sendmail’s libmilter interface.

It scans all incoming and outgoing emails. Infected emails are not forwarded. A

status notification is shown in syslog. It can notify senders, recipients and

administrators of infections.

Functions

Most of these features also apply to MailGate, even when it is not running in Milter

mode.

• All Sendmail features remain available.

Example: SMTP authentication, anti-relaying and anti-spam

• Simple installation and integration in Sendmail

• Hourly or daily Internet update for scan engine and VDF

• Scanning of incoming and outgoing emails

• Reliable on-access detection of viruses and malware

• Configurable reaction when viruses or malware are detected

• Isolation of infected or suspicious files in a quarantine directory

• Logfile used as email traffic log

• Immediate activation of new VDF

• Heuristic macrovirus detection

• Configurable templates for alerts

• Archive scanning

3.3 AntiVir MailGate (Milter Mode) Integration in Sendmail

3.3.1 Requirements

Sendmail version 8.11 or newer with libmilter interface is required.

Otherwise:

Read the README file in libmilter directory of the Sendmail kit

(http://www.sendmail.org).

Compile the new version of Sendmail with libmilter interface.

To check, if Sendmail with libmilter interface has been compiled:

sendmail -d0.10 < /dev/null | grep MILTER

3.3.2 Integration

There are two ways of adding AntiVir MailGate (Milter mode) to Sendmail’s

configuration file sendmail.cf:

z Directly modify sendmail.cf

– OR –

z generate sendmail.cf