A recent eHow tutorial describes how to use JotForm to create email lists and send them newsletters or your offerings. One of the greatest ways to increase your sales is to send your users periodical emails. Don’t overdo it. Send them sparsely. We usually send our users 2-3 times a year and only if we have a major news such as a new version or a discount.
Include real information and provide some value in your emails. Spend your time to make it look fine.
One of the most important benefits of sending a newsletter or announcement email is to remind your users about your site. There will always be a percentage of users who will create an account, use your service and forget about it after a while. Receiving an email from you once in a while will keep them coming back to your service.
It also shows that you are actively working on your web site and improving it. If you do it well, it will improve your reputation.