Internet service providers (GMail, Yahoo, etc.) and anti-spam organizations create the spam traps to prevent spam from reaching people’s inboxes. The important thing for everyone to remember is if you use a purchased list, you are technically spamming the people on that list. Spam is unsolicited email and those people did not request your information.
Once your list is targeted, you need to spend an equally large portion of time coming up with a great deal – even if it means you might lose a bit of money on it. The underlying goal of any marketing campaign is to gain new customers, and it’s worth it to significantly reduce your profit margins to gain said customers. Once you have a surgically-honed list and an amazing offer, then you can spend some time on the design, copy, delivery methods, postage rates, date of delivery, size of the mailer…there are a lot of other options to consider, but following the 40/40/20 rule you can see how important audience and offer truly are.