If you are upgrading from Version 4 to Version 5 you will need a new license key from Crossware.

Please contact our support team at for a new license key.

We will need the Company name that bought the Crossware Mail Signature license together with a contact name and email address.

When you install the new Crossware Mail Signature V5 you need to add your new V5 license key alongside your V4 key.

PLEASE NOTE: V5 is not supported on a 32-bit Windows Operating System.


If you need to upgrade more than one server, please see upgrading multiple servers for further information.

Related Products: CMS DOM v4, CMS DOM v5

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