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Mail Shield

This Article Applies to:

  • Essential/Premium/Ultimate Business Security
  • Small Office Protection


Mail Shield checks incoming and outgoing email messages for viruses and links to malicious websites. This only applies to messages handled by mail management software installed on your computer, such as MS Outlook. If you access your web-based email account via an internet browser, your devices are protected by other shields.

We do not recommend you install this component on a server OS that is also running Microsoft Exchange. The Exchange and Anti-spam components handle Exchange-level filtering and will conflict with this component.

Mail Shield Settings

Mail Shield scans for threats in your incoming and outgoing email messages. Scanning applies only to messages sent or received using mail management software, such as Microsoft Outlook or Mozilla Thunderbird. You can access these settings by clicking Menu ▸ Settings, then navigating to Protection ▸ Core Shields.

Enable Mail Shield: turn this shield on or off

Scan inbound emails (POP3, IMAP4): specify if Mail Shield should scan all incoming emails sent using an SSL/TLS encrypted connection

Scan outbound emails (SMTP): specify if Mail Shield should scan all outbound emails sent using an SSL/TLS encrypted connection

Add a signature to the end of sent emails: includes a message for the recipient in an outgoing email confirming the email has been scanned for malware and is clean

Mark in subject of mail containing a virus: specify a specific word or phrase that will automatically be added to the subject of any email containing a virus

Scan attachment when attaching (Microsoft Outlook only): enable Mail Shield to scan outgoing email attachments sent with Microsoft Outlook