Answer in brief
A launch email sequence for one service is four messages to people who agreed to hear from you: the announcement, the proof, the answers to objections and the deadline. Before sending, authenticate your domain with SPF and DKIM, make unsubscribing a single step and read the consent rules that apply to your readers. Judge the launch by replies, bookings and spam complaints, not by opens.
Four messages are enough when the service is one
A launch email sequence for a single service is one argument delivered in instalments: what is new, the evidence that it works, the honest answer to the reader’s doubt, and the day the offer closes. Four emails cover it. A fifth is justified only when it has a job the first four do not.
Each email has one job and one link, and the sequence ends for anyone who acts. A reader who has booked a call should not receive the deadline reminder two days later. That rule, stop on action, is easy to configure and is the one readers notice.
Two things are settled before any copy is written: who is on the list and by what right, and whether the sending domain passes the checks that mailbox providers publish. This guide follows that order, because a well-written email to the wrong list, or from an unauthenticated domain, is wasted work.
Who is on the list: what two regulators’ pages say
In the United Kingdom, the Information Commissioner’s Office states that marketing emails must not be sent to individuals without specific consent. It describes one limited exception, the “soft opt-in”, for an existing customer who bought, or negotiated to buy, a similar product or service and was offered a simple way to opt out when the address was collected and in every message. It does not cover prospective customers or bought-in lists.
The same guidance treats business recipients differently. Companies and other corporate bodies may be emailed, although the ICO calls a “do not email” list good practice; sole traders and some partnerships count as individuals. The page carries a notice that it is under review following the Data (Use and Access) Act, so read the live version.
In the United States, the Federal Trade Commission’s CAN-SPAM guide starts elsewhere. It says the law covers all commercial email, business-to-business included, and lists among its main requirements accurate header information, honest subject lines, identification of the message as an advertisement, a valid postal address and a working opt-out. Other countries have their own rules, and none of this is legal advice. A cautious working standard: write only to people who asked to hear from you or who already buy something similar from you.
SPF, DKIM and DMARC come before the first send
Mailbox providers publish their own conditions, separate from any law. Google’s Email sender guidelines, which apply to mail sent to personal Gmail accounts, require every sender, among other things, to set up SPF or DKIM authentication, to have valid forward and reverse DNS records, to use a TLS connection and to keep the spam rate shown in Postmaster Tools below 0.3%. Yahoo’s Sender Hub lists a similar set.
Above a volume threshold the list grows. Google’s page sets it at more than 5,000 messages a day to Gmail accounts: those senders need both SPF and DKIM, a DMARC record, whose policy may be “none”, and a From: domain aligned with one of the two. Yahoo asks the same of bulk senders. A list of a few hundred contacts is far below that line, but Google recommends setting up all three in any case.
In plain terms, following Google’s descriptions: SPF stops others sending mail that appears to come from your domain, DKIM lets the receiving server verify that the domain owner really sent the message, and DMARC tells it what to do with mail that passes neither check. If you send through an email platform, Google’s advice is to verify that it authenticates your domain’s mail with SPF and DKIM. Get that confirmed before launch week.
Unsubscribing in one step, and how fast it must take effect
For senders above the 5,000-a-day threshold, Google requires marketing and subscribed messages to support one-click unsubscribe and to carry a clearly visible unsubscribe link in the body. Technically this means two headers in every message, List-Unsubscribe and List-Unsubscribe-Post, described in RFC 8058. Yahoo sets a similar requirement for bulk senders and adds that unsubscribes are to be honoured within two days.
Below the threshold the principle still holds. Google tells every sender to give recipients an easy way to unsubscribe. The FTC’s guide describes the legal floor in the United States: the opt-out must keep working for at least 30 days after the message is sent, requests must be honoured within 10 business days, and no fee or extra personal information may be demanded.
For a launch, build to the strictest of these. Ask your email platform whether it adds the one-click headers, put a plain unsubscribe link in the footer of all four messages and test it yourself. A “skip this launch” option is a courtesy worth offering, but the FTC guide is explicit that a menu of choices must still include a way to stop all marketing messages.
Email one announces, email two proves
The first message says what the service is, who it is for, what the client receives, how the price is formed and when booking opens and closes. The subject line says the same in fewer words. Both the FTC guide and Google’s guidelines insist that a subject line reflects the content, and Google warns against “Re:” or “Fwd:” on messages that are neither replies nor forwards.
The second message, a few days later, carries the proof: one case told concretely, with the starting situation, what was done and what changed, in the client’s words and with their permission. If the service is new and has no cases, say so and show the nearest honest evidence, such as a pilot or a sample deliverable. Invented or inflated proof costs more than none.
The order matters because evidence means nothing until the reader knows what is being offered. Keep each message short enough to read on a phone, with one call to action and the same destination page throughout. If a reader replies with a question, answer it personally; that exchange is worth more than the next scheduled email.
Email three answers doubts, email four names a real deadline
The third message answers objections, and the real ones come from sales conversations and from replies to the first two emails: the price, the timing, a bad experience with a similar service, the option of doing the work in-house. Answer two or three plainly, including the cases where the service is the wrong choice. A message that tells some readers not to buy is believed by the rest.
The fourth message names the deadline, and the deadline has to be real: limited capacity, a start date, a price that changes on a stated day. Give the reason. Google’s guidelines for display names list urgency slogans among the things a sender name must not contain, so the urgency belongs in a truthful subject and body, under your usual name.
None of the sources prescribes intervals for a launch email sequence. Yahoo’s recommendation is to honour the frequency subscribers were led to expect and not to start sending daily to people who signed up for a weekly mailing. So say in the first email that three more will follow and over what period. As an illustration only, days 1, 4, 8 and 12 fit a launch inside two weeks.
Complaints, replies and bookings: the numbers that judge a launch
The first number is a safety limit. Google advises keeping the spam rate shown in Postmaster Tools below 0.10% and never reaching 0.30%; Yahoo’s limit is 0.3%. On a small list the arithmetic is unforgiving: as an example, three complaints from 1,000 delivered messages is already 0.3%. This is the practical reason to write only to people who expect the launch.
The second is what not to trust. Google’s page states that it does not track open rates, cannot verify the open rates reported by third parties, and that low open rates are not necessarily an accurate indicator of deliverability problems. Treat opens as a rough signal and count what the launch exists for: replies, clicks to the booking page, booked calls, signed agreements.
Put the figures in one small table, one row per email: delivered, bounced, replies, clicks, bookings, unsubscribes, complaints. Compare the four rows with each other, not with an industry average of unknown origin. The email that drew the most replies shows which doubt matters most to buyers.
After the deadline, close the offer and keep the list’s trust
When the date passes, the offer closes as announced, with no quiet extension. People who bought move into a different kind of mail. The FTC guide distinguishes commercial messages from “transactional or relationship” ones, such as confirmations of an agreed transaction, and Google advises against mixing the two, for example by putting promotions into receipts.
Clean the list while the data is fresh. Remove addresses that bounced, as both Google and Yahoo recommend, and act on every unsubscribe at once. Note which segments complained or stayed silent; a segment that never responds is a candidate for a reconfirmation message, which both providers suggest for inactive recipients, not for another launch.
Finally, keep a one-page record: the four subject lines, the table of results, the most common objection and the date you last read the provider and regulator pages. Those pages change: Google keeps a table of updates to its requirements, Yahoo says its requirements are subject to change, and the ICO guidance is under review.
Practical checklist
- Write down for each segment of the list how those people gave you their address and what they were told to expect.
- Confirm that your sending domain passes SPF and DKIM and has a DMARC record before the first message goes out.
- Check that every message carries a visible unsubscribe link and that your platform adds the one-click unsubscribe headers.
- Draft four emails with one job and one link each: the announcement, the proof, the objections and the deadline.
- Record replies, bookings, unsubscribes and spam complaints for each email, and stop the sequence for anyone who has booked.
Questions and answers
How many emails should a service launch sequence contain?
Four is a sound default for one service: an announcement, a proof message, answers to objections and a deadline notice. None of the official sources sets a number. Add a fifth only when it has a job the others do not, and tell subscribers in the first message how many will follow and over what period.
Can I email people who never subscribed about a new service?
It depends on the jurisdiction, and this is a summary of official pages, not legal advice. In the UK, the ICO says individuals need to have given specific consent, apart from the soft opt-in for your own customers and similar services. In the US, the FTC’s CAN-SPAM guide lists identification and opt-out duties for all commercial email. Mailbox providers add their own line: Google tells senders not to email people who did not sign up and not to buy lists.
Do small senders need SPF, DKIM and DMARC?
Google’s guidelines require SPF or DKIM from every sender to personal Gmail accounts, and SPF, DKIM and DMARC together from those sending more than 5,000 messages a day to such accounts. Google also recommends setting up all three regardless of volume, and Yahoo’s Sender Hub gives the same advice. For a small business this means publishing records at the domain provider, following the email platform’s instructions.
Is one-click unsubscribe required for every marketing email?
Google requires it for marketing and subscribed messages from senders of more than 5,000 messages a day to Gmail accounts, and Yahoo requires it from bulk senders. Smaller senders are told to make unsubscribing easy, and in the United States the FTC’s guide says commercial email must offer a working opt-out whatever the volume. In practice, supporting one-click from the start is simpler than adding it later.
Which numbers show whether a launch email worked?
Replies, clicks to the booking page, booked calls and signed agreements show the result; unsubscribes and spam complaints show the cost. Google says it does not track open rates and cannot verify those reported by other tools, so opens are a weak guide. Compare the four emails of the sequence with each other to see which message moved people.