The goal was to drive an emotional response from the email campaign. More than 12 million unique emails were sent, with the email content personalised to the individual recipient with information on distances the subscriber had travelled, interesting facts such as how many football pitches that would be and other destinations they could have travelled too.
This rule might sound like bad news for your email marketing campaign, but it can actually improve your open and clickthrough rates. Limiting your subscriber list to just those who specifically asked to join you will ensure only the most interested people are receiving your messages. This maximizes the chances that you'll convert readers to qualified leads as a result of an email send.