Start with the job the email has to do
Before you write a word, answer this in one sentence: what should the reader do after reading this? Not "feel excited about my book" — what action. Click a preorder link. Reply with a question. Tap a coupon. Forward to a friend.
If you can't name the action, you're not writing a marketing email — you're writing an update. Updates are fine, but they don't need a subject line workshop. Marketing emails do.
A few examples of clean jobs:
- Get the reader to preorder Book 3 before Friday.
- Get the reader to download the free prequel novella.
- Get the reader to leave a review on Goodreads.
- Get the reader to reply with their favorite character so I can use it in a future newsletter.
One email, one job. Two jobs in one email cuts conversion roughly in half — readers freeze when they have to choose.
The structure that works
Strong promotional emails almost always follow some version of this skeleton:
- Subject line — earns the open
- Preview text — extends or contrasts the subject
- Hook (first 1–2 lines) — earns the scroll
- Body (50–250 words) — earns the click
- Call to action — one button, one job
- P.S. — catches scanners
The P.S. is not optional. Eye-tracking studies going back to the direct-mail era show readers scan to the P.S. before reading the body. Put your strongest reason-to-act there in one line.
How to write a subject line that gets opened
Aim for 30–50 characters so it doesn't truncate on mobile. Mobile is 60–70% of opens for most lists.
The four subject-line patterns that consistently outperform generic announcements:
- Curiosity gap: "The chapter I almost cut"
- Specificity: "Book 3 launches Tuesday at 9am EST"
- Direct benefit: "Free novella, today only"
- Question: "Should Marcus survive the next book?"
What to avoid: ALL CAPS, more than one exclamation point, the words "free" and "buy" stacked together, and emoji clusters. These don't always trip spam filters, but they signal mass-mail energy and tank opens from your most engaged readers.
When in doubt, A/B test two subjects on a 20% slice of your list and send the winner to the rest. A 3-percentage-point lift on a 5,000-person list is 150 extra opens — enough to matter on a launch.
How to write the body
Three rules cover most of the work:
Write to one person. Not "hi everyone" — "hi." Imagine you're emailing one specific reader you've actually met. Your sentences will get shorter, your contractions will come back, and the email will read like it was written by a human.
Lead with the reader, not yourself. Compare:
- Weak: "I'm thrilled to announce my new book is out today!"
- Stronger: "If you liked the slow burn between Anya and Cole in Book 1 — Book 2 picks up exactly where that left off. It's out now."
The second version answers the only question the reader actually has: what's in this for me?
Cut every sentence that doesn't move the reader toward the action. Most marketing emails are 40% longer than they need to be. Read your draft and delete any sentence that's there for politeness, throat-clearing, or your own reassurance.
A quick marketing email sample
Here's a 90-word launch email that hits every beat:
Notice what's not there: a plot summary, a cover reveal speech, three different links, a request to leave a review. One job. One link. One P.S. with a second reason to act.
Calibrations that quietly move numbers
- Send time: Tuesday–Thursday, 9–11am in your largest reader segment's time zone is the safe default. Your list may differ — check your open-time report after three sends.
- Link count: One primary CTA. If you must include a secondary link, make it text, not a button.
- Image count: Zero to one. Heavy image emails get clipped by Gmail and routed to Promotions.
- From name: Use your name, not your imprint or business. "Jane Smith" beats "Hollowfield Press" by 10–20% on opens for most author lists.
- Plain text version: Always include one. Apple Mail and corporate clients render it; spam filters check for it.
Deliverability is part of copywriting
The best-written promotional email never works if it lands in spam. Two things matter most:
- Authentication: Set up SPF and DKIM on your sending domain. If you're on a platform like AuthorMailingLists.com or Mailchimp or ConvertKit, this is a setup-once checkbox. Skip it and your inbox placement drops 30%+.
- Engagement: Mailbox providers watch what your last 10 sends did. Sending a promo to people who haven't opened anything in a year drags your sender reputation down for everyone else. Segment out cold subscribers before launches.
If you haven't built your list yet, start there: how to make an email list from scratch and how to grow your email list are the two foundations every marketing email rests on.
A repeatable workflow
When I write a promotional email now, the sequence is:
- Write the action in one sentence.
- Draft the P.S. first — it forces the reason-to-act to be concrete.
- Write three subject lines, pick the two least similar, A/B test.
- Write a 60-word body around a single hook.
- Read it out loud. Cut anything that makes you wince.
- Send to yourself. Check the preview text on mobile.
- Send.
Seven steps, maybe 25 minutes once you've done it a few times. Faster than the average author spends agonizing over a single subject line — and the emails perform better because they're shaped by the job, not the mood.
What to do next
Write one email this week using the structure above. One job, one link, one P.S. Send it. Look at the open rate and click rate the next morning. That single data point — your list, your readers, your voice — is worth more than any general benchmark.
Then do it again next week. Email copywriting is a muscle. Eight reps in, you'll be writing better promos than most agencies.