Purchased lists are ineffective, and they impact everyone else who uses Mailchimp, too. If you send emails to a list of people whose contact info you bought, many of the emails will get identified as spam. Some spam filters will flag a campaign if anyone with the same IP has sent spam in the past. When you use Mailchimp, your email is delivered through our servers, so if one person sends spam, it could prevent other users’ emails from reaching inboxes. But by forbidding Mailchimp users from using purchased lists, we increase deliverability for everyone.
In addition to A/B testing, many email marketing packages now offer multivariate testing, which involves using multiple variations of a campaign to test which one performed best. Services that offer this feature include Campaigner and Mailchimp. Another thing to consider when looking for an email marketing platform is how the email campaigns can boost search engine optimization (SEO) for your organization. The right keywords can lead your subscribers from their email platform onto your website. Whether you're looking or a simple email marketing solution or one with full automation, there are several on the market to meet your needs.