MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Send Mail Get Mail - A postcard-sending website.
SendOut - Affordable email marketing for bloggers and influencers
The Simple Postcard - Text a photo to mail it as a postcard
Mailzak - Give a boost to your #EmailMarketing
NanaGram - Text your photos and we'll mail 4x6 prints to your Nana.