Use this option to prevent users from creating their own accounts.

Enabling this option makes users unable to use public folders. (This option may be needed for service providers that don't want every client to share emails)

Filters all emails with inline html-content. Most viruses contain javascript-code or redirect using iframes, etc. That's why some tags are simply filtered with this option:

If you are programming viruses and want to test them, please unset this option or use M$ Outlook (Express).

When viewing html-mails (e.g. newsletters) external images are not downloaded. Most companies use these images to implement a disposition notification for their spam mails.

This enables th ecomplete download of an email as .eml-file in the preview pane. (by clicking on structure inside the preview pane)

Most viruses are sent via email including infected attachments. To block attachments you don't need, you can define its extensions. e.g. to block all .exe and .vbs-files type: .exe, .vbs

Be aware the whole email is still fetched from your mail-server to the mgw-server, the unwanted attachments are only blocked for downloading to your computer.

Perform a scan for viruses of all critical attachments before downloading them. (Those attachments that are critical or not are listed in modules/webmail2/inc/mime_types.php)

When scanning attachments for viruses you need to define the location of your virus-scanner. (e.g. /usr/local/f-prot/f-prot for Windows & F-Prot or c:/scan/scan.exe for McAfee-Commandline-Scanner for Windows)

Defines the type of your virus-scanner.