Most popular form plugin for wordpress now saves your data as custom posts! What this means now is, if you move your blog to another server you dont need to loss your email body’s that were created for the forms.
We learned first hand this problem when we moved a big clients site to wordpress. We found the email body was missing. After looking into it, we found the problem happening because data was being serialized in the database making it only work on the domain the data was created. Since then we were creating a backup of the email body before moving the sites.
Now this problem is gone, as all the data is saved as custom posts in the post table of wordpress, allowing us to not loss the data after site gets moved.