In the order they arrived, from the first email after signup.
How often, when and how Heroku emails its subscribers, measured from every email we received.
Every subject line and preview text, in the order they arrived.
We captured 1 email from Heroku after signing up, all account verification emails.
Its only email arrived 7 days after signup, it sends with Mailgun, its designs lean blue and purple and all of its emails use plain text.
Its subject line is 30 characters long.
