A/B tests permits you to take a look at two diverse variations of your email by sending each one to a little percentage of your viewers. By examining the outcome, you could see which Edition carried out improved and send it out to the rest of your email list. https://www.upwork.com/services/product/development-it-email-deliverability-inbox-reduce-spam-dns-issues-fixed-dkim-spf-dmarc-1378055073774727168?ref=project_share&tier=0