Mailloop is a software product which combines all of the tasks needed to run an online business into one single application.
Mailloop will let you
1. Maintain a customer database
2. Send out personalised Emails with its mail merge feature
3. Automatically handle website form submissions - such as orders, applications, leads, etc
4. Run multiple newsletters, automatically handling subscribe and remove requests
5. Use unlimited built-in autoresponder features
There are a host of other features which you can read about, just click here for the full details.