Follow-up emails are the backbone of cold email success. Most replies come from follow-ups, not the first email. If you're only sending one email and moving on, you're leaving most of your results on the table.
Step 1 is your initial email. It starts a new conversation in the recipient's inbox - it has its own subject line.
Steps 2, 3, 4, ... are follow-ups. By default they send into the same email thread as Step 1, so the recipient sees them as continued replies rather than as separate cold emails.
This is the rule:
Subject empty on Step 2+ → MailBeast reuses Step 1's subject. The follow-up appears in the same thread as Step 1.
Subject filled on Step 2+ → MailBeast uses your custom subject and does not add threading. The follow-up starts a new, separate thread in the recipient's inbox.
Why threading matters: Threaded follow-ups feel natural - like a real person continuing a conversation.
In the Sequence Editor, click the Add step card at the bottom of the step list.
A new step is created.
Set the Wait for X days / Y hours value on the step card - that's the gap between the previous step and this one.
Decide on the subject:
Leave it empty to thread under Step 1 (the recommended default for almost every cold sequence - the placeholder text "Keep empty to reply in same thread" is the hint).
Type a subject to start a new, separate thread.
Write the body.
Save All (⌘S / Ctrl+S).
3-4 follow-ups is the sweet spot for cold outreach.
Most replies come from follow-ups 2 through 4.
After 5, returns drop and complaint risk goes up.
Always end with a breakup email.
MailBeast stops sending the rest of the sequence to a specific lead in any of these cases (see Lead Statuses Explained for the full breakdown):
The lead replies. With Stop on Reply enabled (default), replies stop the sequence. Positive replies (Interested, Meeting Request) always stop, regardless of the setting; neutral replies (Out of Office, Wrong Person, Not Interested, Uncategorized) only stop when Stop on Reply is on.
An out-of-office auto-reply is detected - lead is set to Out of Office.
The email bounces - lead is set to Bounced and skipped.
The lead unsubscribes via the unsubscribe link.
You manually mark them Converted / Lost / Blacklisted.
These stops protect your sender reputation and prevent emails to people who shouldn't receive them.
Keep follow-ups shorter than the initial email. You've already introduced yourself; follow-ups should be brief.
Don't repeat your first email. Each message should add a new reason to respond.
Vary your approach. Mix questions, case studies, direct value propositions, and the breakup close across the sequence.
Use spintax on every step. Deliverability matters as much on Step 4 as it does on Step 1.
Test your timing. If you're not getting replies, try adjusting the waits. Sometimes the content is fine but the timing is off.
The Sequence Editor - the page where steps live.
A/B Testing Your Emails - test variants of each follow-up.
Send Test Emails - preview the full sequence end-to-end before launch.
Lead Statuses Explained - what each "stop condition" actually does.
