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Mail transport advanced settings

You can further customize mail transport protection settings.

Scan also messages received from authenticated or internal connections by

You can choose what type of scan should be performed on messages received from authenticated sources or local servers. Scanning of such messages is recommended as it increases protection, but necessary if you are using the built-in Microsoft SBS POP3 Connector to fetch email messages from external POP3 servers or mail services (for example,,, gmx.dem, etc.). For more information see POP3 Connector and Antispam.

Choose level of protection from the drop-down menu. We recommend that you use Antivirus protection (default setting), especially for internal connections as it is unlikely that phishing or spam messages will be distributed via your local servers. However, you can increase the protection for Microsoft SBS POP3 Connector by choosing Antivirus and anti-phishing protection or even Antivirus, anti-phishing and antispam protection.


This setting turns Antispam protection on/off for authenticated users and internal connections. Emails from non-authenticated connections are always scanned, even if you select Do not scan.


Internal messages from Outlook inside the organization are sent in the TNEF format (Transport Neutral Encapsulation Format). TNEF is not supported by Antispam. Therefore, internal TNEF formatted emails will not be scanned for SPAM regardless of Scan also messages received from authenticated or internal connections by setting.

Remove existing SCL header before the scan

This option is enabled by default. You can disable it your requirement is to keep Spam Confidence Level (SCL) header.

Write scan results to message headers

When enabled, scan results are written into message headers. These message headers start with X_ESET making them easy to recognize (for example X_EsetResult or X_ESET_Antispam).