Mail Shield

This Article Applies to:

  • Business Hub
  • Avast Business On-Premise Console

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.

Business Hub and Cloud Console: Windows and MacOS X configuration options are mixed together in the policy settings for the various components.

On-Premise Console: For Windows configuration options, see below. For MacOS X configuration options, click here: MacOS X (On-Premise Console).

Main Settings Tab

Business Hub and Avast Business Cloud Console

Avast Business On-Premise Console

Inbound mail: choose whether inbound (POP3, IMAP4) email is scanned

Outbound mail: choose whether outbound (SMTP) email is scanned

Newsgroup messages: choose whether newsgroup messages (NNTP) are scanned

Enable IPv6: (Business Hub and Cloud Console) for MacOS X systems; choose whether to scan devices using IPv6 or not

Scan secured connections: (Business Hub and Cloud Console) for MacOS X systems; choose whether to scan emails sent or received over secure protocols or not

Report PUPs: (Business Hub and Cloud Console) for MacOS X systems; choose whether to report potentially unwanted programs (PUPs) or not

Mark mail headers: (Business Hub and Cloud Console) for MacOS X systems; choose whether to add a warning to the header of suspicious emails or not

Email attachments: (Business Hub and Cloud Console) for MacOS X systems; choose whether to remove suspicious email attachments before downloading emails or not

Behavior Tab

Business Hub and Avast Business Cloud Console

Avast Business On-Premise Console

Configure notes added to emails or additional options for MS Outlook.

General: choose whether to insert notes into clean or infected messages, both incoming and outgoing, and/or to add a warning to the subject line of infected emails

MS Outlook only: choose whether to show splash screen, scan files when attaching to email, and/or to scan archived messages when opening (or just unread ones)

SSL Scanning Tab

Business Hub and Avast Business Cloud Console

Avast Business On-Premise Console

Choose whether or not to scan SSL connections.

Actions Tab

Business Hub and Avast Business Cloud Console

Avast Business On-Premise Console

Control what actions are taken by Avast when a virus, potentially unwanted program (PUP), or suspicious file is detected.

Main Action /First action to try : select the first action your Antivirus will take between Fix Automatically, Move to chest, Repair, Ask, Delete, or No Action.

Notification Options: choose whether to show notifications when Mail Shield takes action against a detected threat.

Processing of infected archives: choose whether to only remove the packed file from the archive (and if that fails, do nothing), remove the packed file from the archive (and if that fails, remove the entire archive), or to remove the entire archive.

Packers Tab

Business Hub and Avast Business Cloud Console

Avast Business On-Premise Console

Configure which archive (packer) files Avast Business Antivirus should try to unpack during the scanning process. Unpacked files can be better analyzed for malware by Mail Shield. Unpacking a file is the same as extracting a file from an archive. Original archives, including the files contained within, remain intact when being processed by your Shield.

You can select All packers, or specific packer files from the extensive list by checking the boxes.

Sensitivity Tab

Business Hub and Avast Business Cloud Console

Avast Business On-Premise Console

Adjust the sensitivity of the Avast Business Antivirus scan for Mail Shield.

Heuristics Sensitivity: Heuristics enable Antivirus to detect unknown malware by analyzing code for commands that may indicate malicious intent. The default setting is Normal. With higher sensitivity, Antivirus is more likely to detect malware, but also more likely to make false-positive detections that incorrectly identify files as malware. Code emulations unpack and test suspected malware in an emulated environment where the file cannot cause damage to devices. Use code emulation is enabled by default

Sensitivity: choose to test whole files, which will cause the scan to be slower but more extensive

PUP and suspicious files: choose whether or not to scan for Potentially Unwanted Programs (PUPs)

Report File Tab

Business Hub and Avast Business Cloud Console

Avast Business On-Premise Console

Customize the content of the Shield-specific scan report file, such as which items are included, the file name, and file type. The report is saved in one of the following locations:

  • Windows 10, Windows 8.1, Windows 8, Windows 7, or Windows Vista: C:\ProgramData\Avast Software\Avast\report
  • Windows XP: C:\Documents and Settings\All Users\Application Data\Avast Software\Avast\report

MacOS X (On-Premise Console)

Settings: choose whether to enable IPv6, scan secured connections, report potentially unwanted programs, mark mail headers, and/or remove infected attachments.

Exclusions list: configure the list of URLs that are not scanned by Mail Shield.