Your calendar will not be migrated automatically with your mail. If you would like to move your calendar you can by following either of these references:
Your contacts or address books will not be migrated automatically. If you have contacts you would like in the new system that are not Washburn contacts, you can move them using these references:
Signatures will also not migrate so you will need to recreate it.
Filters and Rules will not migrate so you will need to recreate them.