Want more people to open your emails? A digital marketers’ personal take on subject lines.
In 2019, it is estimated that over 293 billion emails were sent worldwide.*
By 2021, that number is projected to be over 319 billion.*
Even accounting for the estimate that just over half of those emails are likely spam, ** this leaves around 144 billion emails to be sent in 2021, which is still an astonishing number.