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SMTP-Proxy: AntiVirus

If you have purchased and enabled the Gateway AntiVirus feature, the options in the AntiVirus category set the actions necessary if a virus is found in an email message. It also sets actions for when an email message contains an attachment that the SMTP-proxy cannot scan.

When you enable Gateway AntiVirus, you must set the actions to be taken if a virus or error is found in an email message or attachment. The options for antivirus actions are:


Allows the packet to go to the recipient, even if the content contains a virus.


Locks the attachment. This is a good option for files that cannot be scanned by the SMTP-proxy. A file that is locked cannot be opened easily by the user. Only the administrator can unlock the file. The administrator can use a different antivirus tool to scan the file and examine the content of the attachment. For information about how to unlock a file locked by Gateway AntiVirus, see Unlock a File Locked by Gateway AntiVirus.


When you use the SMTP proxy with the spamBlocker security subscription, you can send email messages with viruses or possible viruses to the Quarantine Server. For more information on the Quarantine Server, see About the Quarantine Server. For information on how to set up Gateway AntiVirus to work with the Quarantine Server, see Configure Gateway AntiVirus to Quarantine Email.


Removes the attachment and allows the message through to the recipient.


Drops the packet and drops the connection. No information is sent to the source of the message.


Blocks the packet, and adds the IP address of the sender to the Blocked Sites list.

If you set the configuration to allow attachments, your configuration is less secure.

Limit scanning to first

Gateway AntiVirus scans each file up to a specified kilobyte count. Any additional bytes in the file are not scanned. This allows the proxy to partially scan very large files without a large effect on performance.

In the Limit scanning to first text box, type the file scan limit.

For information about the default and maximum scan limits for each SMTP-proxy model, see About Gateway AntiVirus Scan Limits.

See Also

About the SMTP-Proxy

About Gateway AntiVirus

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