Copywriting That ConvertsEmail copy and microcopy · Lesson 13 of 19

Email copy: subject lines, bodies and sequences

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Email copy: subject lines, bodies and sequences

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Email copy: subject lines, bodies, sequences

  • They invited you in
  • Subject line + preview text
  • One email, one job
  • Deliverability rules that shape copy

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Email is a conversation with permission

Email subscribers have invited you into their inbox. That permission is valuable — and fragile. Good email copy respects it by being relevant, useful and honest. (This lesson focuses on the copy; the separate email marketing course covers deliverability, automation and list management in depth.)

Subject lines and preview text

The subject line and preview text (preheader) decide whether an email is opened. Principles:

  • Front-load: many mobile inboxes show only the first few dozen characters of a subject line.
  • Be specific: "Your Ramadan order cut-off is Thursday" beats "Important update".
  • Use preview text to extend, not repeat, the subject line.
  • Match the content: misleading subject lines can breach laws (for example, the US CAN-SPAM Act prohibits deceptive subject lines) and damage trust.
  • Personalisation: a first name can help, but relevance of content matters far more.
WeakStrongerPreview text
Newsletter #423 checkout fixes you can make todayNo developer needed for #2
Don't miss out!!!Your free trial ends FridayHere's what you'll keep if you upgrade
HelloYour order is on its wayTrack it live — arriving Tuesday

The body: one email, one job

Every email should have one primary purpose and one primary CTA. Structure:

Opening line:  Connect to the subject line immediately; no throat-clearing.
Body:          Deliver the value (story, tips, offer) in short paragraphs.
CTA:           One clear, verb-led link or button.
Sign-off:      A real person's name where appropriate.
P.S. (opt.):   Restate the CTA or add a secondary point — often widely read.

Write as if to one person. "You" and "I" feel more human than "we are pleased to inform our valued customers".

Common email types and their copy focus

Email typeCopy focus
WelcomeDeliver what was promised, set expectations, one next step
Educational newsletterGenuine usefulness; the CTA can be soft
PromotionalClear offer, deadline if real, benefit-led product copy
Abandoned cartFriendly reminder, answer objections, easy return path
Re-engagementHonest check-in, easy opt-out, reason to stay
Transactional (receipts, shipping)Clarity first; light, relevant cross-promotion only where permitted

A simple welcome sequence

Email 1 (immediately): Deliver the lead magnet / confirm sign-up. Set expectations:
                       "You'll hear from us every Tuesday with one practical idea."
Email 2 (day 2):       Most useful quick win related to their sign-up reason.
Email 3 (day 4):       Story or case study showing the outcome (with permission).
Email 4 (day 6):       Answer the top objection; introduce the offer.
Email 5 (day 8):       Clear offer with honest urgency if applicable.
  • Send marketing only where you have a lawful basis — often consent (for example under the UK's PECR and GDPR regimes and EU rules), or permitted soft opt-in for existing customers in some jurisdictions.
  • Identify the sender clearly.
  • Include a working unsubscribe link in every marketing email, and honour it promptly.
  • Include a physical postal address where required (for example, by CAN-SPAM in the US).
  • Do not use deceptive subject lines or "Re:" / "Fwd:" tricks.

Rules differ across markets, including the UAE, Saudi Arabia and Pakistan, so check the regime for each audience you email.

Worked example: abandoned cart email for a home décor store

Subject:  Still thinking about the rattan lamp?
Preview:  Here are the answers to the 2 questions people ask most
Body:
  "Hi Sara,
   You left the rattan table lamp in your basket. No pressure — here's what other customers
   usually want to know:
   - It fits standard E27 bulbs (bulb not included).
   - Delivery across the UAE takes 2-4 working days, and returns are free within 14 days.
   Your basket is saved for you."
CTA:      "Return to my basket"
P.S.      "Questions? Reply to this email — a real person reads every one."

The copy answers real objections rather than resorting to discount pressure.

Deliverability rules that now shape email copy

Since 2024, Gmail and Yahoo have enforced requirements for bulk senders (Google defines bulk as roughly 5,000+ messages a day to personal Gmail accounts), and Microsoft applied similar rules to Outlook.com consumer mailboxes from May 2025:

  • Authenticate your domain with SPF, DKIM and DMARC (your email platform guides you through this).
  • Support one-click unsubscribe (the List-Unsubscribe header) for marketing email and honour it promptly; keep a visible unsubscribe link in the body.
  • Keep spam complaint rates low — Google advises staying below 0.1% and never reaching 0.3%.

For copywriters this means: every email must be something subscribers expected and want. Misleading subject lines ("Re: your order" on a promotion) raise complaints, hurt deliverability for every future send, and can breach laws such as the US CAN-SPAM Act. Check the current sender guidelines in Google's and Yahoo's help centres.

Hands-on: a three-email abandoned-browse flow (copy skeleton)

Trigger: viewed a product twice, no add-to-cart, has marketing consent. Exit if purchased.

Email 1 (after 4 hours) - Help
Subject: Still deciding on the [product]?
Preview: Sizes, delivery dates and returns, in one place
Body: 3 short answers to the top objections for that category + CTA "See the [product] again"

Email 2 (after 2 days) - Proof
Subject: What [customer type] say about the [product]
Preview: Real reviews, including the not-so-perfect ones
Body: 2-3 verified reviews (one balanced), a photo from a customer (permission on file), CTA

Email 3 (after 5 days) - Alternatives
Subject: Not quite right? Try these instead
Preview: Similar styles, same free exchanges
Body: 3 related products, exchange policy line, CTA "Browse similar"

Note: no automatic discount. Train subscribers to expect help, not coupons; test any incentive deliberately.

Before and after: subject lines

BeforeProblemAfter
"Newsletter #47"No reason to open"3 ways to cut your electricity bill this summer"
"RE: Your account" (promotional)Deceptive, complaint risk"Your August savings report is ready" (if it is)
"LAST CHANCE!!! 🔥🔥🔥"Shouting; urgency may be fake"Sale ends Sunday at midnight (GST)"

Using AI for email copy

Ask AI to draft variants of subject lines and preview text within your voice guide, then pick using judgement and test at scale. Do not let AI personalise with data you did not collect with consent, and review anything that makes claims about the reader ("Since you're struggling with…").

Common mistakes

  • Several competing CTAs.
  • Subject lines that promise more than the email delivers.
  • Long corporate introductions before the point.
  • Forgetting mobile: long paragraphs and tiny buttons.
  • No unsubscribe link or a deliberately hidden one.

Key takeaways

  • Subject line and preview text work together; front-load and be specific.
  • Each email should have one purpose and one primary CTA.
  • Write to one person in a human voice; the P.S. is widely read.
  • Follow email marketing law: lawful basis, clear sender, working unsubscribe, no deceptive subjects.

Check your understanding

Quick questions to lock in the lesson. They don’t count towards your certificate.

  1. What is the best use of preview text?
  2. Which subject line is most specific?
  3. Which practice is required in marketing emails under laws such as CAN-SPAM and PECR/GDPR regimes?
  4. A retailer's promotional email uses the subject line 'RE: Your order' to boost opens. What is the main risk?

Put it into practice

Write a five-email welcome sequence for a product you know, with subject lines, preview text and one CTA per email.

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