AI email marketing: write campaigns that actually get opened

Email is still the highest-returning marketing channel available to small businesses. A well-written email to a list of 500 people who actually want to hear from you will outperform a social post seen by 5,000 strangers every time.

The problem is that most business owners either don't send emails at all, or they send something dull that nobody reads. AI fixes the writing problem completely. Here is how to use it across every type of email.

Subject lines: the only thing that matters at first

Nobody reads your email until they open it. Nobody opens it unless the subject line makes them want to. This is where most email marketing falls apart, and it is also the easiest thing AI can fix.

Good subject lines are specific, create mild curiosity or urgency, and feel like they were written by a person, not a marketing department.

Bad: "Our March newsletter is here!" Good: "The HMRC deadline most business owners miss (and how to avoid it)"

Bad: "Check out our new service" Good: "We're now doing same-day appointments in Leeds"

Prompt to copy:

"I need 10 subject line options for an email about [topic]. The recipients are [description of audience]. The goal is [what you want them to do: read, click, book, reply]. Make them feel personal and human, not like marketing copy. Include a mix of: curiosity-based, benefit-based, and urgency-based options. UK audience. No clickbait."

Pick the best one. Test two against each other if your email platform supports A/B testing.

Welcome sequences

When someone signs up to your list, the first email they receive is the most important one you will ever send them. Open rates on welcome emails are two to three times higher than any other email. Most businesses waste this moment with a generic "Thanks for signing up."

A welcome sequence is a series of three to five emails sent over the first week or two after someone joins your list. They set expectations, build trust, and gently move the new subscriber towards becoming a customer.

Prompt to copy:

"Write a 3-email welcome sequence for a [type of business] in the UK. The subscriber signed up because [reason, e.g. they downloaded a free guide about X]. Email 1: deliver the value they signed up for and introduce the business briefly. Email 2 (send 2 days later): share one genuinely useful tip related to [topic]. Email 3 (send 4 days later): introduce our main service/product and invite them to take action, without being pushy. Tone: warm, direct, human. UK spelling throughout."

Read what Claude or ChatGPT produces and adjust for your own voice. Add a specific example, a local reference, or a personal story. The structure is the hard part and AI does that for you.

Promotional emails

These are the emails you send when you have something to sell or a specific offer to promote. They need to be clear, benefit-led, and not apologetic about the fact that you're selling something.

Prompt to copy:

"Write a promotional email for a [type of business] in the UK. The offer is [describe your offer]. The email should: start with a strong hook that addresses a problem the reader has, explain the offer clearly without waffle, include at least one benefit-led bullet point list, handle one common objection, and end with a clear call to action. Tone: confident but not pushy. Around 250 words. UK spelling."

Do not bury the offer. State it clearly in the first three lines. Readers scan emails. If they don't see what you're offering immediately, they won't look for it.

Newsletters

A regular newsletter, sent weekly or fortnightly, is one of the best things a small UK business can do for long-term customer relationships. It keeps you top of mind, builds expertise in the reader's eyes, and drives sales over time without hard selling.

Prompt to copy:

"Write a short, useful email newsletter for a [type of business] in the UK. This week's main topic is [topic]. Include: a two-sentence opening that hooks the reader in, one useful tip or insight (the meat of the newsletter), a brief business update or personal note (two or three sentences), and a soft call to action. Total length: around 300 words. Tone: expert but conversational. Not formal. UK spelling."

The best newsletters feel like they come from a person, not a company. Read the draft back and add one specific detail that only you would know: a client situation (anonymised), something that happened this week, a view you hold strongly. That detail is what makes people look forward to your emails.

The simple system

Here is the setup that works:

1. Use Mailchimp, Klaviyo, or ConvertKit to manage your list and send emails.
2. Write your welcome sequence once (takes about an hour with AI), set it to send automatically, never touch it again.
3. Write your newsletter once a week or fortnight. Use the prompt above. Takes 20 minutes.
4. Send a promotional email whenever you have an offer. Use the prompt above. Takes 15 minutes.

Three types of emails, all written with AI, all sent consistently. That is a better email marketing operation than most UK businesses are running right now.