Follow the steps below to configure Link Lock.

  1. Go to Filtering > Link Lock.

  2. If Link Lock is not enabled, select Enabled. See Enabling Link Lock.

  3. Select the Policy Configuration tab and configure your settings:

    • Rewrite DKIM-signed mail: Allow Link Lock to rewrite emails with a DKIM signature.


      Selecting this option invalidates both DKIM and S/MIME signatures, which may affect scoring on other mail systems.

    • Follow redirection links: Select to allow Link Lock to follow redirected URLs (up to a max. of 5). This protects against a legitimate URL redirecting to a malicious URL.


      Selecting this option may affect system performance.

    • Display a button on the block page to continue to the blocked site: Allow a user to continue to a blocked URL from the block page.

    • Show the original website URL on the block page: Display the blocked URL on the block page.

    • Show logo on the block page: Displays the image currently being used on the Link Lock block page. Default:

    • Use custom logo on the block page: Select Choose File to upload a custom block page image. The following file formats are supported: PNG, JPG and JPEG. Maximum file size is 2048 KB.

    • Use custom message on the block page: Select to allow you to add a custom block page header and/or message.

  4. Click Save Changes.

Link Lock Block Page Examples

Below are examples of a Link Lock block page using the default logo, header and message. These settings can be customized for your domain using the settings described above.

This article relates to SpamTitan Skellig.