That's a nice and simplistic interface however I've been using PostalMethods (http://www.postalmethods.com) for awhile and they offer an email interface and a Web Service API (http://www.postalmethods.com/postal-api) for a cheaper price when sending regularly. They also support postcards.
I think Dustin's service is most suitable for occasional letter senders while PostalMethods is most suitable for businesses wanting to automate their mailing.
Comments
That's a nice and simplistic interface however I've been using PostalMethods (http://www.postalmethods.com) for awhile and they offer an email interface and a Web Service API (http://www.postalmethods.com/postal-api) for a cheaper price when sending regularly. They also support postcards.
I think Dustin's service is most suitable for occasional letter senders while PostalMethods is most suitable for businesses wanting to automate their mailing.