ESET Mail Security for Linux/BSD

ESET Mail Security simultaneously scans for malware, spyware and spam in all inbound and outbound traffic. It also enables custom configuration by mailbox and filters to limit scanning based on file size, nested archives and scanning time.

Its unsurpassed scanning speed and detection rate, combined with its very small footprint, make ESET NOD32® Antivirus the ideal choice for Linux mail server environments.

From lower-powered, small office mail servers to enterprise-class ISP mail servers with thousands of users, ESET Mail Security delivers the performance and scalability you expect from a Linux-based solution, and the unmatched security of ESET NOD32 Antivirus.

Key Features
- User-friendly installation and simple configuration
- MTA-independent solution (mail server independent)
- Unpacks archived e-mail attachments without the need for any external programs
- Scanning requests are sent to the running daemon for increased speed and efficiency
-Various levels of logging can be configured
- Does not require external libraries or programs except for libc.
- Supports writing infiltration information into e-mail header, footer or subject
Multi-threaded
- Flexible setup of scanning parameters allows a different configuration for each mailbox (account) via SQL database, LDAP, or Radius server

System Architecture Description
The system consists of two modules: the SMTP filter for outbound messages, and the MDA wrapper for inbound messages, both described below. The SMTP filter acts as a mail server performing antivirus scanning. Before a mail message is dispatched, the ESET NOD32 Antivirus daemon (nod32d) checks it for the presence of virus infections. If a virus is detected, it is stopped, or an alternative action is triggered based on the current setup parameters. The SMTP filter works with one global configuration for all mailboxes and e-mail addresses, in contrast to the MDA wrapper described below. The MDA wrapper is activated like a standard MDA (maildrop, procmail, etc.). It intercepts e-mail, scans it with the nod32d daemon and, based on the scanning results, triggers a predefined action. If no infection is detected, the message is forwarded to the standard MDA, which delivers the message into proper mailbox. An individual set of parameters for each mailbox is supported.

System Requirements
- OS Linux (Kernel 2.2.x, 2.4.x and 2.6.x, glibc 2.2.5 or higher)
- Mail Transport Agent (e.g.: postfix, sendmail, qmail, exim, etc.)
- Mail Delivery Agent (e.g.: maildrop, procmail, deliver, local.mail)
- 5MB hard-disk space and 8MB RAM (does not include the mail server memory requirements)

Supported Distributions
ESET NOD32 Antivirus supports most popular mail server software (including Sendmail, Qmail, Postfix, Exim, etc.) and runs under all of the common Linux & BSD distributions.

- RedHat
- Mandriva
- SUSE
- Debian
- Other Linux, via generic API in TGZ format
- FreeBSD Unix via TGZ format

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