Hi @pnewest, thanks for the followup, see my answers:
*#1: All form data that is submitted to Webflow servers is encrypted with SSL, no matter what server you are hosting on. If you point your forms at some other mail service provider or your own script, then data is not submitted to Webflow servers
#2: Once the data has been received to Webflow servers, you can login to Webflow and access your form submissions on the Forms tab of your site settings: http://help.webflow.com/elements/forms#form-submission-data. The Webflow login and access to your Form data on your Webflow site dashboard is encrypted with SSL and is secure.
I hope this helps. If not, please let me know – I'm happy to assist further!