Most email campaigns fail before the first sentence. The subject line is vague, the preview text repeats it, and the body tries to sell four things at once. The reader gives it half a second, decides it is not for them, and moves on. Writing better email is mostly a discipline of removing things.
The Subject Line's Only Job
A subject line does not need to be clever. It needs to earn the open from a specific person who already agreed to hear from you. Specific beats clever: "Three fixes for a slow checkout" tells the reader what is inside. "You won't believe this" tells them nothing and costs trust.
Keep it under about forty-five characters so it survives mobile truncation. Avoid all caps, excessive punctuation and fake reply prefixes. Test two versions on a small segment when you have the volume, but do not chase tiny differences; a clear promise repeated consistently beats constant novelty.
Preview Text and the First Sentence
The preview text is the second half of the subject line, not a place to repeat it. Use it to add the detail that makes the promise concrete: "The cheapest fix took ten minutes." Together, subject and preview should form one complete thought.
The first sentence decides whether the rest is read. Skip the throat-clearing. "Hope you're well" and "In today's fast-paced world" both signal that nothing useful follows. Start with the problem, the result or the specific observation. Write the first sentence last, once you know what the email actually says.
One Email, One Job
Every campaign should have a single action attached: read a guide, reply, register, buy one product. If you cannot name the action in five words, the email is not ready. Secondary links dilute the primary one, and readers who are given three choices often take none.
Structure the body around the reader's situation, not your company history. A useful pattern is: name the problem, explain why it happens, give the fix, then offer the next step. Three short paragraphs are usually enough. If the email needs a table of contents, it should be a web page with an email announcing it.
- One primary call to action per email
- Subject under 45 characters, preview text that adds information
- Body of 80 to 200 words for most campaigns
- One link repeated is better than five different links
- Send at a consistent time your audience can predict
Plain Text and Formatting
Plain, personal-looking email often outperforms a designed template, especially for small lists. Use a single column, generous line spacing and a readable font size. Images should support the message, not carry it, because many readers block them by default.
Write link text that makes sense out of context: "read the checklist" rather than "click here". Keep paragraphs to three or four lines on mobile. Use bold sparingly. If the email looks like a landing page, it will be treated like an ad, and the reader's defences will go up before they reach the offer.
Write the email you would want to receive from a colleague you respect: short, specific, and easy to act on.
Personalisation Without Creepiness
Using a first name is fine when you actually have it. Referencing a recent purchase is helpful when it is relevant to the message. Referencing a page someone visited an hour ago, or guessing at personal details, feels like surveillance and damages trust.
Segment by behaviour you can explain: new subscribers, active readers, past customers, people who clicked a specific topic. Then write one useful variation for each group. Three honest segments beat twenty automated rules nobody understands. Always give the reader a way to update their preferences instead of only unsubscribing.
Cadence and the Unsubscribe
Choose a rhythm you can sustain for a year. Weekly is common for content, monthly for product updates, and event-driven for transactional mail. Sending more often because a quarter is slow trains people to ignore you. Sending less often than promised makes them forget who you are.
Make unsubscribing easy and immediate. A hidden or broken unsubscribe link is a legal problem and a deliverability problem, because readers will mark you as spam instead. Offer a lower-frequency option for people who like the content but not the volume. Respect the choice the same day.
Testing a Campaign Before It Ships
Send a test to yourself and to a colleague who has no context. Check the subject on a phone lock screen, the preview text in the inbox list, and the links on both mobile and desktop. Read it once for typos and once for tone. If a sentence sounds like a press release, rewrite it.
After sending, review clicks and replies rather than opens alone. Ask one question: did the email cause the action it was written for? Keep a short log of what you tested and what happened, so next quarter starts from evidence. For the technical side, see email marketing foundations. If the campaign promotes a product, our guide to pricing digital products will help you choose the offer.
Good email is a habit of respect: respect for the reader's time, the promise they signed up for, and the small piece of attention they gave you.
