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4.1.5
Transport Agent
In this section, you can set up automatic startup of the transport agent as well as the agent loading priority. On
Microsoft Exchange Server 2007 and later, it is only possible to install a transport agent if the server is in one of two
roles: Edge Transport or Hub Transport.
NOTE: Transport agent is not available in Microsoft Exchange Server 5.5 (VSAPI 1.0).
In the Agent priority setup menu, you can set the priority of ESET Mail Security agents. The agent priority number
range depends on the version of Microsoft Exchange Server (the lower the number, the higher the priority).
Write spam confidence level (SCL) to the header of scanned messages based on spam score – SCL is a normalized
value assigned to a message that indicates the likelihood of the message being spam (based on the characteristics of
the message header, its subject, content, etc.). A rating of 0 indicates that the message is highly unlikely to be spam,
while a rating of 9 indicates that the message is very likely spam. SCL values can be processed further by the Microsoft
Exchange Server's Intelligent Message Filter (or Content Filter Agent). For additional information please refer to the
Microsoft Exchange Server documentation.
The When deleting messages, send SMTP reject response option:
If unchecked, the server sends an OK SMTP response to the sender's Mail Transfer Agent (MTA) in the format '250
2.5.0 – Requested mail action okay, completed' and then performs a silent drop.
If checked, an SMTP reject response is sent back to the sender's MTA. You can type a response message in the
following format:
Primary response code
250
451
550
Warning: Incorrect syntax of the SMTP response codes can lead to malfunctioning of program components and
decrease effectiveness.
NOTE: You can also use system variables when configuring SMTP Reject Responses.
Complementary status code
2.5.0
4.5.1
5.5.0
Description
Requested mail action okay, completed
Requested action aborted: local error in processing
Requested action not taken: mailbox unavailable
25
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