Mail transport protection

The following systems have Mail transport protection available in Advanced settings > Server:

Microsoft Exchange Server 2003 (Front-End Server)

Microsoft Exchange Server 2003 (single server installation with multiple roles)

Microsoft Exchange Server 2007 (Edge Transport or Hub Transport server role)

Microsoft Exchange Server 2007 (single server installation with multiple roles)

Microsoft Exchange Server 2010 (Edge Transport or Hub Transport server role)

Microsoft Exchange Server 2010 (single server installation with multiple roles)

Microsoft Exchange Server 2013 (Edge Transport server role)

Microsoft Exchange Server 2013 (single server installation with multiple roles)

Microsoft Exchange Server 2016 (Edge Transport server role)

Microsoft Exchange Server 2016 (Mailbox server role)

Microsoft Exchange Server 2019 (Edge Transport server role)

Microsoft Exchange Server 2019  (Mailbox server role)

Windows Small Business Server 2008

Windows Small Business Server 2011

Any of the following Antivirus actions on the transport layer can be set under Actions to take if cleaning not possible:

No action - retain infected messages that cannot be cleaned

Quarantine message - send infected messages to the quarantine mailbox

Reject message - reject an infected message

Drop message silently - deletes messages without sending NDR (Non-Delivery Report)

note_icon_note NOTE

If you select No action and at the same time have Cleaning level set to No cleaning in ThreatSense parameters of Antivirus and antispyware, then the protection status will change to yellow. This is because it is a security risk and we do not recommend that you use this combination. Change one or the other setting in order to achieve a good level of protection.

Any of the following Antispam actions on the transport layer can be set under Action to take on spam messages:

No action - keep the message even if it is marked as spam

Quarantine message - send messages marked as spam to the quarantine mailbox

Reject message - reject messages marked as spam

Drop message silently - delete messages without sending NDR (Non-Delivery Report)

mail_trans_protection

SMTP Reject Response - you can specify a Response code, Status code and Response message which define the SMTP temporary denial response sent to the SMTP server if a message is refused. You can enter a response message in the following format:

Response code

Status code

Response message

250

2.5.0

Requested mail action okay, completed

451

4.5.1

Requested action aborted:local error in processing

550

5.5.0

Requested action not taken:mailbox unavailable

554

5.6.0

Invalid content

note_icon_note NOTE

You can also use system variables when configuring SMTP Reject Responses.

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).

Add notification to the body of scanned messages offers three options:

Do not append to messages

Append to infected messages only

Append to all scanned messages (doesn't apply to internal messages)

Add note to the subject of infected messages - When enabled, ESET Mail Security will append a notification tag to the email subject with the value defined in the Template added to the subject of infected messages text field (predefined default text is [found threat %VIRUSNAME%]). This modification can be used to automate filtering of infected messages by filtering emails with a specific subject, for example using rules or alternatively on the client side (if supported by the email client) to put such email messages into a separate folder.

Add note to the subject of spam messages -  When enabled, ESET Mail Security will append a notification tag to the email subject with the value defined in the Template added to the subject of spam messages text field (predefined default text it [SPAM]). This modification can be used to automate spam filtering by filtering emails with a specific subject, for example using rules or alternatively on a client side (if supported by the email client) to put such email messages into a separate folder.

note_icon_note NOTE

You can also use system variables when editing text which will be added to the subject.