Relevant Products: Signature Manager Exchange Edition
Mail Utilities is only compatible with Exchange 2003 and earlier. If you are moving to Exchange 2007 and above, you will need to upgrade to Signature Manager Exchange Edition.
Although Mail Utilities and Signature Manager Exchange Edition perform a similar function, they are completely separate programs and built on different codes. Due to this, there is no file export/import feature between the two products - you will need to re-create your rules and templates in Signature Manager Exchange Edition.
The template and rule editor in Signature Manager Exchange Edition is much easier to use, as well as being more powerful and flexible, so it will not take long to recreate the templates and policies.
Also, as Signature Manager Exchange Edition allows for more flexible rule combinations than the one sender and one recipient rule set allowed by Mail Utilities, you may find you can cut down on the number of rules you have.
You can also easily clone any templates or policies you make in the Signature Manager Exchange Edition, so you can make any changes without having to start from the beginning each time.