12 Questions to Ask Before You Choose an Email Design Partner

Choosing someone to design your campaign emails looks easy on paper. Compare portfolios, compare quotes, pick the work you like. The problems show up in month two: a launch email that breaks in Outlook, a third round of edits billed by the hour, a designer booked solid the week of your biggest sale.

This checklist is for e-commerce brands and Klaviyo agencies weighing a freelancer, an agency, a design subscription or a done-for-you service. Send the 12 questions in writing before the first call.

Speed and brand fit

1. What is your turnaround from brief to send-ready email?

Why it matters: A campaign that misses its date is a campaign you did not send, and turnaround sets how far ahead you must plan.

Good answer: Firm business-day figures for standard and complex builds, and what “ready” means: designed, or built in your ESP and ready to schedule.

2. How are revisions counted and billed?

Why it matters: Revisions are where a cheap quote turns expensive. One fussy launch email can cost more than the rest of the month.

Good answer: Written terms: how many rounds are included, what counts as a round, and what happens after.

3. How will you learn our brand?

Why it matters: Early emails are weakest while a new partner still guesses at your colors, type, photography and tone.

Good answer: A defined onboarding step that reviews your brand guide, store and best past emails, and a way to stay consistent when several people work on your account.

4. Who writes the copy?

Why it matters: Many quotes cover design only. If you still write every subject line and offer block, you have bought half a campaign.

Good answer: A clear yes or no. If yes, ask for samples in your category and who checks prices and discount codes.

Technical quality

5. Which ESPs do you build for, and what do you deliver?

Why it matters: A flat image or design file still has to be sliced, linked and given alt text, often by your team.

Good answer: Named platforms, such as Klaviyo, and clean HTML or a native template with links and alt text in place. Ask for a sample file and import it yourself.

6. How do you test rendering across inboxes?

Why it matters: Gmail, Outlook, Apple Mail and mobile apps display the same email differently, and dark mode adds another layer.

Good answer: A named QA step before you see the draft, covering desktop, mobile and dark mode. Good partners ask which inboxes your list uses.

Process

7. Do you plan the calendar, or only design what we brief?

Why it matters: Most teams run out of time to plan and brief long before they run out of design capacity.

Good answer: Either “we plan it,” with how many weeks ahead, or an honest “we design to your brief,” so you know to keep planning in-house.

8. Who owns the files?

Why it matters: If you part ways, you want your templates and source files, not a handover fee.

Good answer: You own the final emails and source files and can export them at any time. Get it in the contract.

9. How does feedback work?

Why it matters: Feedback scattered across long email threads gets lost, and lost notes turn into mistakes your list sees.

Good answer: Comments placed directly on the design, a named person who responds, and a record of what changed between versions.

Capacity and fit

10. What happens during seasonal peaks?

Why it matters: Black Friday and your own launches are when you send most and every designer is busiest.

Good answer: A specific plan: when peak calendars get locked, whether volume limits change, and who covers if your contact is out.

11. Do you offer white-label options for agencies?

Why it matters: A Klaviyo or retention agency needs production help its clients never see.

Good answer: Outputs delivered under your agency’s name, several client brands in one workspace, and clear confidentiality terms.

12. How can we trial you before committing?

Why it matters: A portfolio shows a partner’s best work for other brands. A trial shows their normal work for yours.

Good answer: A small paid test or a few free campaigns, with no long contract. Run it on a real upcoming send to test the whole process.

Using the answers

Vague answers on turnaround, revisions and file ownership are the clearest warning signs, because those terms cost you later. Weight the rest to your volume: a brand sending weekly and an agency running a dozen client calendars need different things.

For one example of how a done-for-you service answers these questions, look at Nexmail’s white-glove email design. You connect your Shopify store and it pulls your logo, colors, fonts, voice and product catalog. Most designs are ready within 1 to 2 business days, feedback happens through Figma-style comments, and finished emails export to Klaviyo and other ESPs such as Mailchimp and Omnisend. Its agency plans include white-label outputs. The first 2 campaigns are free, with no card required, which covers question 12.