It's practically impossible to overstate the importance of direct mailing lists to the success of your direct mail program. The correct mailing list will contain your most valuable prospects. The more careful you are in analyzing and selecting direct mailing lists, the better your chances for success. There are several different categories of mailing lists available on the market today ranging in cost and appropriateness for your market. When you are considering what type of mailing list to buy consider the following three types:

You want to have a single purpose for your direct mail piece. Often times the goal of a direct mail campaign is to get the recipient to buy a product or use a service. Other goals can be to send people to your website, get people to enter a contest, or let people know about an upcoming event. Knowing your goal will help you formulate what you want the direct mail piece to say. You also need to consider what the recipient stands to gain from the letter.
A/B testing is trying two different techniques that communicate the same message on a small percentage of your list, seeing whether A or B performed the best, then using the better performing option when you email the rest of the list. It sounds complicated, but there are plenty of email marketing solutions out there that take all the math and guesswork out of it. (All you have to do is come up with the option A and option B you want to try.)
When planning a direct mail campaign, don’t forget that you still need to follow the basic direct mail rules. A good list, a good design and a strong call-to-action are a must in order for your direct mail to be a success. Provide information on how people can use the technology you are including and strong content for them to view. If the content is not well designed, then your effort will have been a waste of time.
The purposes of blast emails are often to generate more sales, gain new customers, and increase traffic to the company’s website. To successfully do this, the email must capture recipients' attention, and motivate them to perform an action, such as purchasing an item online. These results can then be easily tracked through the links provided in the email, and the company can use these statistics to determine a conversion rate, or the percentage of customers who take the desired action. For testing purposes, companies often send out several different blast emails to determine which format is most effective, and may even customize email for a particular target audience.

Alternatively, ad space may be offered for sale in a bidding market using an ad exchange and real-time bidding. This involves many parties interacting automatically in real time. In response to a request from the user's browser, the publisher content server sends the web page content to the user's browser over the Internet. The page does not yet contain ads, but contains links which cause the user's browser to connect to the publisher ad server to request that the spaces left for ads be filled in with ads. Information identifying the user, such as cookies and the page being viewed, is transmitted to the publisher ad server.
Some web browsers offer privacy modes where users can hide information about themselves from publishers and advertisers. Among other consequences, advertisers can't use cookies to serve targeted ads to private browsers. Most major browsers have incorporated Do Not Track options into their browser headers, but the regulations currently are only enforced by the honor system.[89][90][91]
Find things that encourage people to engage. By tracking the statistics on each of your emails, you'll be able to develop concise reports about what works and what doesn't for your target audience. Take note of the specific days and times for your highest open and conversion rates. Test different tones and subject lines and see what causes your audience to read the blast. Stick to the things that your consumer tends to favor or enjoy and avoid repeating aspects of emails that do poorly according to the stats.
An omni-channel approach not only benefits consumers but also benefits business bottom line: Research suggests that customers spend more than double when purchasing through an omni-channel retailer as opposed to a single-channel retailer, and are often more loyal. This could be due to the ease of purchase and the wider availability of products.[24]