What are some alternatives?
Squarespace Email Campaigns - Email, but pretty.
The Simple Postcard - Text a photo to mail it as a postcard
Campaigns by Marsello - An email marketing upgrade to a powerful retention app
Postacard - Text a photo to send it as a postcard for $3.
Email Planner - Email campaign planner for last minute Marketers
Send Mail Get Mail - A postcard-sending website.