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The median cold email sequence runs 3 emails. The longest 25% run 4 or more, and only the longest 5% reach 9. Reply rate falls with every step, from 1.18% on the first email to 0.33% on the seventh.
Number of emails in each sequence, first email included. Built from more than 850 million emails sent through Smartlead.
| Sequence | Emails |
|---|---|
| Shortest 10% | 1 email |
| Shortest 25% | 2 emails or fewer |
| Median | 3 emails |
| Longest 25% | 4 emails or more |
| Longest 10% | 5 emails or more |
| Longest 5% | 9 emails or more |
Reply rate for emails sent at each position in the sequence.
| Step | Reply rate | Contacts per reply |
|---|---|---|
| Email 1 | 1.18% | 85 |
| Email 2 | 0.73% | 137 |
| Email 3 | 0.56% | 179 |
| Email 4 | 0.49% | 204 |
| Email 5 | 0.37% | 270 |
| Email 6 | 0.35% | 286 |
| Email 7 | 0.33% | 303 |
Three emails is the norm. Half of all sequences run 3 emails or fewer, and three in four run 4 or fewer.
Long sequences are rare. Only the longest 10% of sequences reach 5 emails, and only the longest 5% reach 9.
Every step earns less than the one before. The biggest drop comes straight after the first email, from 1.18% to 0.73%. After that, reply rate falls slowly, and the seventh email still earns 0.33%, one reply per 303 contacts.
The next-biggest drop comes after the fourth email, from 0.49% to 0.37%. By that point, three in four sequences have already stopped.
One in ten sequences is a single email. Those senders get the first email's 1.18% and none of the follow-up replies.
The 3 email rule comes from workplace email. If a thread goes back and forth three times without being resolved, stop emailing and talk instead.
In cold email, people use the name for a three-email sequence, one first email and two follow-ups. That matches the median sequence in this data.
Most guides recommend 2 or 3 follow-ups, for 3 or 4 emails in total. The median sender sits at the low end of that range, and only about one in ten sequences runs past 4 emails.
It shows how long sequences are and how each step replies, not the best length for a given list. It doesn't count unsubscribes or spam complaints, so it can't show when a follow-up starts to cost more than it earns.
The data has no hard limit, but long sequences are rare. The median sequence runs 3 emails, and only the longest 10% run 5 or more. Each step earns less, from 1.18% on the first email to 0.33% on the seventh.
In workplace email, it means that if a thread goes back and forth three times without being resolved, you should talk instead. In cold email, it usually means a three-email sequence, one first email and two follow-ups, which matches the median in this data.
3 or 4. The median sequence runs 3 emails, and the longest 25% run 4 or more. Reply rate drops most after the first email, and again after the fourth.
More than 850 million emails sent through Smartlead, using combined, anonymous platform data only. Only senders with at least 500 emails sent in the period are included. Sequence length counts every email in a sequence, first email included. Reply rate by step is the reply rate for emails sent at each position.
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