Email Sequence: Steps, Examples, Stop Rules

What is an email sequence?

An email sequence is a fixed series of emails sent to one person in a set order, with a wait between each step. One rule separates it from a newsletter: every step checks a stop condition before it goes out. If the recipient replied, bounced or unsubscribed, the rest of the sequence is cancelled for that person. Without that check, you'd just be sending scheduled emails.

Here's an example of a cold B2B sequence. Step 1 is a short first email to the head of operations at a logistics firm. If there's no reply after a few business days, step 2 goes out as a reply in the same thread and adds one new piece of information. Step 3, a few days later, asks a yes/no question. Step 4 is a closing message that says this is the last email. Any reply at any point stops steps 2 to 4 for that recipient. A sequence is defined by its triggers and stop rules, not by how many emails it contains.

Email sequence examples by type

Sequences come in a few common types. They differ in what starts them, who gets them and what ends them. Only the cold outbound type goes to people who haven't asked to hear from you. That changes the legal basis and the deliverability risk.

Sequence type	Trigger	Recipient	Typical stop condition
Welcome / onboarding	Sign-up or purchase	Opted-in subscriber or customer	Last step sent or unsubscribe
Nurture	Content download or form fill	Opted-in lead	Booked call, unsubscribe or last step
Re-engagement	No activity for a set period	Existing subscriber	Click, reply or removal from list
Cold outbound	Contact added to a prospect list	Person with no prior contact	Reply, bounce, unsubscribe or last step
Post-call follow-up	Sales call held	Prospect who spoke with you	Reply or agreed next step

How to build a cold email sequence, step by step

1. 1 Authenticate your sending domain. Publish SPF, a DKIM key for every service that sends as your domain (Brevo included), and a DMARC record at _dmarc. Google's email sender guidelines require bulk senders to have SPF, DKIM and DMARC in place.
2. 2 Check the legal basis for each country. Germany's Act against Unfair Competition (UWG) requires prior consent for email advertising, including B2B. The US CAN-SPAM Act allows cold email but requires a working opt-out and an accurate sender identity.
3. 3 Verify the list. Remove hard bounces and role addresses, and treat catch-all results as unknown rather than valid.
4. 4 Write the first touch. Cover one reason for contacting this person, one relevant point and one easy question.
5. 5 Write the follow-ups as replies. Send each one with In-Reply-To and References headers pointing at the Message-ID of the earlier message, so mail clients keep them in one thread.
6. 6 Set stop conditions. A reply, a bounce, an unsubscribe or a manual "not interested" ends the sequence for that recipient.
7. 7 Space the steps several business days apart, and count follow-ups toward each mailbox's daily volume.
8. 8 Send a closing message as the final step, then stop. Don't restart the same person in a new sequence a week later.

For thread headers, timing between steps and when to stop, see cold email follow-up timing and threading. Daily caps are covered in how many cold emails per day per mailbox.

Follow up sales email: what each later step should do

A follow-up sales email in a sequence has to add something the first email didn't have. That could be a different angle, a short example or a direct question. If it only says "bumping this up", it's another message in the recipient's inbox with no reason to answer. Send it as a reply in the original thread, not as a new message with "Re:" typed into the subject line. A typed "Re:" doesn't carry In-Reply-To headers, so clients won't thread it. It also suggests an earlier conversation that never took place. The FTC's CAN-SPAM guidance specifically bans subject lines that mislead about the content of a message.

What doesn't work: sending follow-ups to addresses that bounced on step 1, sending all steps from a different domain than the first email, and continuing after someone says "not now". Each of these pushes complaints and bounces up on a domain you have to keep using.

Sales follow up email template for each step

Follow up sales email template: step 2

Hi {first name}, one more point I left out last time: {specific observation about their team or process}. If that's on your list this quarter, I can send a two-paragraph outline of how others handle it. Want it?

Sales follow up email template: step 3

Hi {first name}, quick yes/no: is {problem} something you own, or should I be talking to someone else on your team?

Closing step

Hi {first name}, I'll stop here so I'm not filling your inbox. If {topic} comes up later, just reply to this thread and I'll pick it up.

There are more variants by situation in our sales follow up email templates, and more on how to close a sequence in breakup email templates and timing.

Cold email deliverability: why a sequence multiplies the risk

Cold email deliverability is decided by the receiving server. It checks whether SPF and DKIM pass and line up with your From domain under DMARC. It also weighs your domain's reputation, bounces, spam complaints and how much you send. A sequence multiplies every one of those signals. One bad address on the list bounces once per step. One annoyed recipient can report each follow-up they get. That's why list verification and stop-on-reply matter more in a sequence than in a single send. Sending everything from your own domain has one practical effect: the reputation the receiving server sees is yours, and you can look at the domain data in Google Postmaster Tools. Which folder a message is filed in remains the receiving server's call, not the sender's. For the full list of signals, see what decides cold email deliverability.

What is an email deliverability rate, and how should you read it for a sequence?

Email deliverability rate usually means delivery rate: the share of sent messages the receiving server accepted, or accepted ÷ sent. Acceptance says nothing about which folder the message was filed in. The server can accept a message and put it in spam, and delivery rate can't tell the difference. For a sequence, measure it per step. If step 1 has a much lower rate than later steps, the list has bad addresses. A falling rate across steps on the same list points to reputation or volume. The difference between the two metrics is covered in email deliverability rate: delivery vs inbox.

Which tool should run an email sequence?

The right tool depends on who the sequence goes to. Tools built for opted-in subscribers and tools built for one-to-one sales emails stop at different points. The table compares four tools on the same properties, based on each vendor's own documentation.

Tool	Built for	Where contacts live	Where it stops for cold B2B
HubSpot sequences (documented in HubSpot's knowledge base, "Create and edit sequences")	One-to-one sales emails and tasks from a rep's connected inbox	HubSpot CRM	Needs HubSpot as your CRM. Check the knowledge base for which seats include sequences
Brevo automations	Marketing workflows triggered by contact events	Brevo contact lists	Built around marketing sends. Read Brevo's anti-spam policy before importing contacts who haven't opted in
Kit sequences (documented in Kit's help center, "Creating and sending an Email Sequence in Kit")	Creator and newsletter sequences for subscribers	Kit subscriber list	Built for people who subscribed, not for prospecting lists
Mailchimp automations / customer journeys	Marketing journeys for an audience	Mailchimp audience	Mailchimp's Acceptable Use Policy covers how contacts were collected. Read it before importing anyone who didn't opt in

Where a personalised video step fits: EmailFlow OS

For teams that want a video email as one step in their outreach, there's a EmailFlow OS product for that. Here's how it works. You record one video and upload it to EmailFlow OS. Then you connect your Brevo account and sending domain and import your prospect list into EmailFlow OS. EmailFlow OS turns that one recording into a separate version for each recipient, not one per company. Each version is sent from your own inbox, through your own Brevo account and your own sending domain, never from a shared platform sender. The DKIM signature and the reputation stay with the domain you already authenticated. The prospect list sits in EmailFlow OS, and the Brevo account and domain stay under your control. The product page for personalised AI video email for B2B cold outreach explains the setup.

What goes wrong in an email sequence

• Replies don't stop the sequence. The cause is usually reply detection that only watches one mailbox while replies arrive somewhere else.
• Follow-ups show up as new conversations. The cause is missing In-Reply-To and References headers, or a typed "Re:" with no real reference.
• Hard bounces keep coming on step 2. The cause is that bounced addresses weren't removed after step 1.
• DMARC fails on some steps only. The cause is that one step goes out through a service whose DKIM key isn't published for your domain.
• Unsubscribes are ignored in later steps. The cause is an opt-out list that isn't checked before each step goes out, not just the first.

Questions people ask

? How many emails should a cold email sequence have?

No standard sets a number. A cold sequence usually has a first touch, a few follow-ups and a closing message. The real limit is relevance: each step has to add something new, every follow-up counts toward your mailbox's daily volume, and every extra step gives an annoyed recipient another chance to report spam. Stop after the closing message.

? What is the difference between an email sequence and a drip campaign?

A drip campaign sends scheduled emails to a list, usually opted-in subscribers, and often keeps going no matter what each person does. An email sequence goes to one person at a time and stops when that person replies, bounces or unsubscribes. Cold sales outreach needs that stop-on-reply behaviour, so it's run as a sequence.

? Should follow-ups in a sequence be sent as replies?

Yes, for cold outreach. A real reply carries In-Reply-To and References headers that point at the Message-ID of your first email, so Gmail and Outlook show it in the same thread. Typing "Re:" into a new message's subject doesn't create that link. It also suggests an earlier exchange that never happened.

? Is an email sequence legal for B2B cold outreach in the EU?

That depends on the country and how you work, not on the tool. Germany's Act against Unfair Competition (UWG) requires prior consent for email advertising, including to businesses. GDPR requires a legal basis for processing the contact data. The US CAN-SPAM Act instead allows cold email if it includes an opt-out and an accurate sender. Check each target country before you send.