What is a lead nurturing email?
It is a short email to a person who has already shown interest, such as downloading a guide, asking about price or taking a demo, but who isn't ready to buy yet. Its job is to make the next step easy when they are ready. Our lead nurturing definition covers the idea; this post covers the emails themselves.
Nurture emails differ from the two sequences small teams already know. A cold sequence goes to people who never asked to hear from you and runs for two to three weeks; the structure is in our guide to cold email sequences that get replies. A signup or demo no-show sequence is about a single action, and our guide to email sequence tools has both written out. Nurture runs for months, and each email should be set off by something the lead did or said.
Three rules keep a nurture email worth opening:
- One trigger. Send because something happened; when nothing has, wait at least a month.
- One useful thing. An answer, a number, a short example, never only a "checking in".
- One easy reply. A question they can answer in a line.
Who can you send lead nurturing emails to?
In the US, anyone who hasn't opted out, as long as each email follows CAN-SPAM (the FTC guide's list of main requirements, checked 5 November 2026, includes no prior-consent rule); in the UK and EU, it depends on how you got the address and whether the person is an individual. The FTC's CAN-SPAM compliance guide treats an email as commercial when its primary purpose is to promote a product or service, which covers nurture emails, and it says the law makes no exception for business-to-business email. Each one also needs honest header and subject lines, a clear disclosure that it is an ad, your postal address and a clear opt-out, honoured within 10 business days.
The UK and EU texts differ in a detail that matters for nurture. PECR regulation 22, which applies to email to individual subscribers, allows marketing without prior consent when you got the details "in the course of the sale or negotiations for the sale", you market only your similar products, and the person could refuse when you collected the details and in every message since. Article 13(2) of the EU ePrivacy Directive speaks of contact details a business obtains from its customers in the context of the sale, and, as a directive, it applies through each member state's own national law.
| How you got the lead | US (CAN-SPAM) | UK individual (PECR reg. 22) | EU individual (ePrivacy Art. 13) |
|---|---|---|---|
| Ticked a box to get your emails | Yes, with opt-out and address | Yes, with consent | Yes, with consent |
| Asked for a quote or took a demo, no box ticked | Yes, with opt-out and address | Possibly, if it counts as negotiations for a sale and they could refuse at the time | The text covers customers in the context of a sale; check national rules |
| Downloaded a guide, no box ticked | Yes, with opt-out and address | Get consent first | Get consent first |
| Cold prospect who replied "not now" | Yes, with opt-out and address | Reply to them personally; ask before adding them to a nurture list | Reply to them personally; ask before adding them to a nurture list |
For EU data, Article 21 of the GDPR gives people the right to object to direct marketing at any time, says their data shall no longer be processed for marketing once they do, and requires that right to be brought to their attention at the latest in the first communication. Business addresses follow other rules again; our comparison of GDPR, UK PECR and CAN-SPAM covers them. This is a summary of the texts, not legal advice.
When should you send a lead nurturing email?
When the lead does something, and on the date they gave you; never on a timer alone. This table pairs the common triggers with a send time and an exit:
| Trigger | When to send | Stop or move on when |
|---|---|---|
| Downloaded a guide or template | Within the hour, then once a week later | They reply or book; after 2 emails with no reply, move to monthly |
| Asked about price but didn't book | Next working day | They book or say no |
| Demo or call, no decision | Two days after, then on their decision date | They decide either way |
| Said "not now" with a date | The week of that date | They give a new date or say no |
| A trigger event at their company (hire, funding, new role) | Within a week of it | They reply or the next trigger |
| Nothing has happened | At most monthly | Three months with no reply or click: send the re-permission email |
Two cautions. Don't use opens as a trigger: Apple's page on Mail Privacy Protection says that, when it is turned on, it prevents senders from seeing whether you opened their email. Use replies, clicks and booked calls. And for "not now" leads, our guide to turning "check back next quarter" into a dated follow-up covers the questions that get you a real date.
Lead nurturing email examples you can copy
Six emails, one per trigger above. Priya, Acme and Northwind Ltd are sample names; replace the brackets. Every one goes out with your opt-out line and postal address in the footer.
Email 6 follows Google's email sender guidelines, which suggest periodically sending messages to confirm that recipients want to stay subscribed. If they don't answer, remove them.
How many nurture emails can you send before it hurts?
Fewer than you might expect on a small list, because a single spam report counts for a lot. Google's sender guidelines say to keep the spam rate reported in Postmaster Tools below 0.10% and to avoid ever reaching 0.30% or higher. Here is what that means for a sample list:
Northwind Ltd (an example) has 400 nurture leads, 300 of them on Gmail addresses, and sends one monthly email.
| Spam reports in one send | Share of 300 Gmail recipients | Against Google's lines |
|---|---|---|
| 0 | 0% | Fine |
| 1 | 1 ÷ 300 = 0.33% | Above 0.30% |
| 2 | 2 ÷ 300 = 0.67% | More than twice 0.30% |
Postmaster Tools calculates its own rate, so treat this as a sense of scale: 0.10% of 300 is 0.3 of a report, so on this rough count one annoyed person in a single send is enough to cross both lines. Sending weekly instead of monthly to the same list gives four times as many chances a month to collect that one report.
So send only when a trigger fires, run the re-permission email at three months, and keep volume small. At 400 leads a month, Northwind sends 4,800 nurture emails a year (400 × 12), far below the more than 5,000 messages a day to Gmail accounts at which Google requires marketing messages to support one-click unsubscribe (that count covers everything a sender sends to Gmail, not only nurture). A visible unsubscribe link is still worth adding at any size, and the law needs an opt-out anyway.
Set up a lead nurturing track this week
Tag every lead by source
Note how you got each address: opt-in box, quote request, demo, download or cold reply. That one field decides who can go in the track under the rules above.
Pick three triggers
Start with the download, the pricing question and the demo with no decision. Write emails 1 to 3 from the examples, with your own details.
Write the exit rules first
Stop on any reply, booking, no or opt-out, and remove an opt-out from every list, not only this one.
Count replies by email, monthly
Note which email each reply and booking came from. Rewrite the one with no replies after three months, and send email 6 to anyone silent for three.
If you want the sequences and the lead list in one place, Siela's built-in CRM includes email sequences and bulk campaigns with open and click tracking, and Lead Finder saves each lead it finds there with the reason it was picked.
Frequently asked questions
How often should you send lead nurturing emails?
Send when the lead does something, such as downloading a guide, asking about price or reaching the date they gave you, and at most monthly when nothing has happened. On a send to 300 Gmail addresses, one spam report is 0.33% on a rough count, past Google's 0.30% line, so every extra send carries real risk. Ask quiet leads after three months whether to keep sending.
What is the difference between a nurture email and a follow-up email?
A follow-up email continues a conversation you already started, usually within days, and stops after two or three tries. A nurture email keeps a relationship going over months with someone who isn't ready yet. It is set off by a new trigger, carries one useful thing and asks for a one-line reply rather than a meeting every time.
Do lead nurturing emails need an unsubscribe link?
In the US, every commercial email needs a clear way to opt out and your postal address under CAN-SPAM, and opt-outs must be honoured within 10 business days. In the UK the soft opt-in needs a simple way to refuse in every message. Google requires one-click unsubscribe for marketing messages from senders of more than 5,000 a day to Gmail.
Can you put cold prospects into a nurture sequence?
In the US you can, provided each email meets CAN-SPAM. In the UK, PECR's consent rule covers email to individual subscribers, including sole traders, and the soft opt-in only applies to details gained during a sale or negotiations for one. The safer habit everywhere is to answer a cold prospect personally and ask before adding them to a list. This is not legal advice.
How long should a lead nurturing campaign last?
As long as the lead keeps engaging, with a check at three months. If someone hasn't replied or clicked in that time, send a short email asking whether they want to keep hearing from you, and remove them if they don't answer. Google's sender guidelines suggest periodically confirming that recipients want to stay subscribed.
Sources
- US Federal Trade Commission: CAN-SPAM Act compliance guide for business (Aug 2023, edited Jan 2024; checked 5 Nov 2026)
- legislation.gov.uk: Privacy and Electronic Communications (EC Directive) Regulations 2003, regulation 22 (as amended 5 Feb 2026; checked 5 Nov 2026)
- EUR-Lex: Directive 2002/58/EC (ePrivacy Directive), Article 13 (checked 5 Nov 2026)
- EUR-Lex: Regulation (EU) 2016/679 (GDPR), Article 21 (checked 5 Nov 2026)
- Apple iPhone User Guide: Use Mail Privacy Protection (checked 5 Nov 2026)
- Google Workspace Admin Help: Email sender guidelines (checked 5 Nov 2026)