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Mailbox database protection

If Proactive scanning is enabled, new inbound messages will be scanned in the same order they are received. If this option is enabled and a user opens a message that has not been scanned yet, this message will be scanned before other messages in the queue.


Background scanning

Allows scanning of all messages to run in the background (scanning runs on the mailbox and public folders store, for example the Exchange database). Microsoft Exchange Server decides whether a background scan will run or not based on various factors such as the current system load, number of active users, etc. Microsoft Exchange Server keeps a record of scanned messages and the virus signature database version used.

If you are opening a message that has not been scanned by the most current virus signature database, Microsoft Exchange Server sends the message to ESET Mail Security to be scanned before opening the message in your email client. You can choose to Scan only messages with attachments and filter based on time received using the following Scan time limit options:

All messages

Messages received within last year

Messages received within last 6 months

Messages received within last 3 months

Messages received within last months

Messages received within last week

Since background scanning can affect system load (scanning is performed after each detection engine update), we recommend that you schedule scans to run during non-work hours. Scheduled background scanning can be configured via a special task in the Scheduler/Planner.

When you schedule a Background scanning task you can set the launch time, the number of repetitions and other parameters available in the Scheduler/Planner. After the task has been scheduled, it will appear in the list of scheduled tasks and you can modify its parameters, delete it or temporarily deactivate the task.

Number of scan threads

Number of scan threads can be in range from 1 to 21. You can set the number of independent scan threads which used at same time. More threads on multiprocessor machines can increase the scan rate. For the best program performance we advise using an equal number for ThreatSense scan engines and scan threads.

Scan RTF message bodies

Option activates scanning of RTF message bodies. RTF message bodies may contain macro viruses.


Plain text email bodies are not scanned by VSAPI.

Actions to take if cleaning not possible:

No action—No changes in message will apply

Truncate to zero length—Attachment will be shortened to zero length

Replace content with action information—Original body will be replaced with action information. Content of attachment will be replaced with action information.

Delete message—Message will be deleted

Action to take on phishing message:

No action—No changes in message will apply

Delete message—Message will be deleted


Public folders are treated the same way as mailboxes. This means that public folders are scanned as well.