If you’re already running Klaviyo, adding direct mail is one of the easiest ways to unlock more revenue without rebuilding your retention strategy from scratch.
This guide breaks down seven proven ways Shopify brands can layer direct mail into their existing Klaviyo flows, from browse abandonment and welcome sequences to abandoned cart, post-purchase, winback, unreachable customers, and VIP campaigns.
The core idea is simple: the same flows that work in email can work in direct mail too, helping brands reach people who miss digital messages and drive more first and repeat purchases.
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If you're running Klaviyo flows, you're already doing the hard part.
You've segmented your audience. You've written the copy. You've tested the timing. You know what converts.
Now here's the secret: if it works in email, it works in direct mail.
And the beautiful part of all this: you're not starting from scratch. You're taking proven winners and amplifying them with a physical touchpoint that lands in people’s hands.
Email and direct mail together create an extraordinarily powerful 1–2 combo in owned marketing.
Email delivers lightning-fast, personalized content that hits inboxes instantly. Direct mail creates that tangible, wow moment that makes your brand impossible to forget.
When you run them sequentially (lead with email, then tack on direct mail), you're maximizing touchpoints across channels, keeping your brand more top-of-mind, and reaching prospects or customers wherever they're most likely to convert—not everyone responds to digital.
Now, let’s talk tactics. So, here’re seven proven ways to drive net-new and repeat revenue by adding direct mail into your existing Klaviyo strategy:
7 Email x Direct Mail Enhancements to Launch
1. The Browse Abandonment Retargeting Enhancement (A Double Enhancement)
Part 1: Targeting Known Browsers
You’re likely already using the Klaviyo pixel to target known browsers through email. The pixel can be enriched further with tools like Retention.com and Blotout—which is exactly what the legends at Fresh Clean Threads do to reach even more customers.
They kick this up a notch by adding automated direct mail to the equation.
It’s a subtle nudge, but it works. Just in case the browser missed retargeting emails, they (literally) can’t miss the postcard.
Part 2: Targeting Unknown Browsers
The big brain move here: make sure you’re targeting unknown browsers, too.
And that’s where direct mail delivers.
By layering on identity resolution to ID anonymous browsers who never gave you their emails, you’re able to match 20–40% of browsers with addresses. Translation: you can send them direct mail.
Gozney, the premium pizza oven maker, tested this with a direct mail retargeting pixel.
They added a pixel to their site via Google Tag Manager that identified these “window shoppers” and automatically fired off trifolds featuring their major products to those visitors.
The results: $116k in revenue on 151 orders, at a 16x ROAS.
That's found money—revenue Gozney couldn't touch with email alone.
The play: Set up a parallel browse abandonment flow. Email goes to known visitors. Direct mail reaches both known AND anonymous traffic through address matching.
2. The Welcome Flow Enhancement
Your welcome series is one of your highest-performing flows.
But why stop at email?
Throw in direct mail, too.
And before you ask… Yes, you can do that.
Even if someone hasn't purchased yet, you can send them direct mail. And this works phenomenally well over major sales events or holiday seasons when you’re driving more traffic to your site and getting more email signups than usual.
Kindred Bravely, the maternity and nursing wear brand, leveraged this over Labor Day by sending postcards to new leads who had signed up for their email list.
The postcard went out to warm leads who'd gone through the welcome flow but hadn't converted.
The results: 10.4x ROAS and a 5.37% conversion rate. Not too bad, eh? That translated into a lot more revenue that wouldn’t have been possible without direct mail.
The play: Add a triggered postcard at day 7 or 10 in your welcome flow. Feature your hero product or bestseller with strong social proof.
3. The Abandoned Cart Enhancement
Cart abandoners are your hottest prospects.
They were a hair’s breadth from buying.
And of course you're already hitting them with email (after all, abandoned cart emails are the most valuable you can send). But 60-70% of those emails go unopened.
Direct mail gives you a second chance at converting them.
Take Mini Katana, the viral sword brand, who added postcards to their abandoned cart flow. Whenever someone leaves a sword in their cart without buying, they automatically send a postcard a few days later.
The results: 8.3x ROAS on a single postcard send.
The play: Layer postcards into your abandoned cart flow—most brands find sending cards at the 3–5 day post-abandon mark is most effective. If they haven't responded to email, a physical reminder lands differently. Feature the exact product they left behind with a clear CTA back to checkout.
4. The Post-Purchase Enhancement (Drive Second Purchases)
Recency is the single strongest predictor of subsequent purchases.
Sending a follow-up offer after a purchase, then, is of the essence.
KURU, the heel-first footwear brand, has aimed to reduce the time between first and second purchases, and found that direct mail has provided a cost-effective way to get back in front of folks who have potential to become lifelong fans.
To shorten that time and drive repeat purchases, KURU’s has used direct mail as an extension of post-purchase email drip flows for different audiences—these are timed to arrive about 14 days post-purchase.
These postcards have driven pretty crazy results:
- $600K+ revenue
- 11.5x ROAS
- 4.5% CVR
All of those numbers represent second-purchase data—over half a million in second purchases that wouldn’t have otherwise happened.
The play: Automate a postcard 5-7 days post-purchase in your thank-you flow. Keep it warm and brand-forward. For high-AOV customers, consider upgrading to a handwritten card—it makes an outsized impact on loyalty.
5. The Winback Playbook
Every brand has a natural repurchase window: the typical time between first and second purchase, second and third, and so on.
If a customer passes that window without buying again, they're drifting.
Email tries to pull them back. But direct mail creates urgency differently.
toty, Sofia Vergara’s suncare brand, has automated postcards to arrive at a number of different intervals—for example, targeting customers whose last order date was 120 or 240 days ago—to drive repeat purchases.
And these cards, on average, drove a strong 4x+ ROAS. Meaning that many of those one-time buyers likely became profitable.
That’s huge, and it was only possible with the power of mail.
The play: Set up an automated flow triggered when a customer passes their expected repurchase window. Send a postcard featuring your bestseller or a product they haven't tried yet. Make it feel like a personal recommendation, not a discount blast.
6. The “Unreachable” Winback Campaign
Some customers have gone fully dark. Unsubscribed from email. Stopped opening messages. Not in your retargeting audiences.
But they're still customers. And you paid to acquire them.
So, get them back with direct mail.
That’s exactly what Urbani Truffles, the luxury truffle brand, did. They had many VIP customers—people who'd spent thousands—who had gone completely silent for over a year.
DTC Gang (their agency) ran a direct mail winback campaign targeting these lapsed high-spenders.
The results: They pulled back customers email couldn't reach, at an absolutely ridiculous 17x ROAS.
The play: Segment customers by “unsubscribed.” Send them mail. Revenue up and to the right.
7. The VIP Appreciation Card
Your top 10%–20% of customers drive disproportionate revenue, and pulling out all the stops to keep them happy and win them back should be your number one retention priority.
Brands can (and should) send special offers and even totally separate campaigns to VIP customers.
Portland Leather Goods, for example, rewards its highest tier loyalty members—the “unicorn whisperers”—with totally separate marketing materials. Rather than just sending emails and SMS to the whisperers, though, PLG is also sending them direct mail.
The play: set up a Klaviyo segment for VIP customers (your chosen parameters: top 10% by LTV, highest RFM score, repeat purchasers, high engagement, or some combination), then trigger a handwritten card after key moments—anniversary of first purchase, 5th purchase milestone, birthdays.
The Playbook: How to Literally Implement This (You Need the Right Platform)
To literally implement this, you’re going to need a direct mail platform with a strong enough Klaviyo integration.
PostPilot is fantastic because they have a powerful Klaviyo integration that lets Shopify brands build flows seamlessly into the customer journey — they’re one of only a few Klaviyo Premier tech partners—and because they set everything up and design all your mail.
To figure out which tactics will work best for you, the PostPilot team recommends running incrementality testing, which can be done in the platform. You can take a jog–run approach (vs. starting at a “walk”): launch one-off tests with a bunch of these tactics, then scale the winners.
Ultimately, though, direct mail’s like email.
The brands seeing the biggest lift are running multiple automated flows in parallel (cart abandonment, post-purchase, winback, VIP) all working together.
The Bottom Line
If you're already running Klaviyo, you've done the hard work.
You know your segments. You know what converts. You know your timing.
Direct mail will amplify everything you’re doing and drive revenue that wouldn’t be possible otherwise.
The same flows that work in email work in direct mail. You're just reaching people in a different channel and meeting them where they are.
