Basic rules to boom your newsletter subscriptions By Tim Karpisek on 27 June 2011 in Email Marketing, Opt-in, Tips Creating an opt-in database is one of the keys to your email marketing success. We already told you how to opt-in your existing contact list , but sometimes it’s hard to convince new people to sign up for your newsletter. They might suspect your newsletter to be another piece of junk mail that is solely out there to commercially exploit them. There is one question they will always ask: what do I gain by subscribing? It’s up to you to tell them.