It's a bad habit, but I love to run sequences. Check out these open rates.
Email 1: 72%
Email 2: 50%
Email 3: 71%
Email 4: 90%
Typically, if the content in email 1 is bad, email 2 heads to trash or SPAM - and that learning cascades for each email in the sequence. Not here. The content is so good, engagement continues.
Sender is the same for each email.
Worth noting, email 2, the worst email open rate. For some, that would be consider gold.