Why your best email campaign needs an SMS trigger (with real click-rate data)
By Steve Merrill | April 29, 2026
One SMS changed the day.
The email campaign was running at about a 5% click rate. We added one text message to the same audience, timed around the campaign, and clicks jumped to 14%.
Not a tiny lift. Nearly triple.
The lesson was not "send more texts." The lesson was that SMS can wake up an email campaign people already wanted but had not opened yet.
Why does an email campaign need an SMS trigger?
An email campaign needs an SMS trigger when the message is important enough to earn attention outside the inbox. SMS works best as an amplifier, not as a replacement for email.
Email carries the detail. SMS creates the tap on the shoulder.
Klaviyo describes email and SMS as complementary channels, with SMS often used for time-sensitive prompts and email used for richer content. Klaviyo's SMS and email marketing guide lines up with what we saw in the account: the text did not need to sell the whole offer. It needed to point people back to the thing they missed.
That matters for Shopify brands because inboxes are crowded. Your best campaign can be buried under receipts, school emails, shipping alerts, and 40 other brands yelling about a sale.
A well-timed SMS can rescue attention.
What happened in the campaign?
The campaign click rate moved from roughly 5% to 14% after one supporting text message. The text did not replace the email. It increased the number of people who went back and clicked.
This was not a giant strategy overhaul. No new funnel. No elaborate launch calendar. Just a simple cross-channel nudge.
The SMS message was short. The email had the detail. The timing did the work.
That is the part I want Shopify operators to see. Most retention programs do not need another complicated automation. They need better coordination between the assets they already have.
When should SMS support email?
SMS should support email when timing matters, the offer is strong, and the audience has clear consent and recent engagement. It should not support every email by default.
Use SMS for moments like:
- Launch day for a product people have been waiting for
- Back-in-stock alerts for high-demand items
- Last call on a real deadline
- VIP early access
- Event reminders or webinar reminders
- High-intent cart or checkout recovery
Do not use it for weak newsletter reminders. Do not use it because the email calendar feels lonely. Do not use it because someone said "SMS has high open rates" in a webinar.
Use it when the customer would thank you for the reminder.
How do you set up an SMS trigger for an email campaign?
Set up the SMS trigger by sending email first, waiting for enough time to identify non-clickers or priority recipients, then texting the segment most likely to act. The trigger should point back to the offer, not repeat the entire email.
A simple structure:
- Send the email campaign. Make the email the primary sales asset.
- Wait 2 to 6 hours. Give engaged subscribers time to open and click naturally.
- Build the SMS audience. Include people with SMS consent who received the email and match the campaign intent.
- Exclude recent clickers or buyers. Do not annoy people who already acted.
- Send a short reminder. One sentence, one link, one reason to care now.
- Measure the lift. Compare email clicks, total clicks, purchases, opt-outs, and revenue per recipient.
Klaviyo's cross-channel resources point to using customer preferences and channel behavior when routing messages. Klaviyo's cross-channel marketing guide is useful if your team needs a broader framework.
What should the SMS actually say?
The SMS should say one clear thing: why the customer should go look now. It should not cram the entire email into a tiny message.
Bad SMS:
"Our spring product collection is here with incredible new items, limited-time pricing, and special offers for loyal subscribers. Shop now."
Better SMS:
"The new drop is live. If you missed the email, this is the one worth opening: [link]"
Short. Human. Specific.
The best SMS trigger feels like a helpful reminder from the brand, not a second campaign screaming from a different channel.
What are the compliance rules you cannot ignore?
You cannot text people just because they are on your email list. SMS requires proper consent, clear opt-out handling, and attention to timing rules.
This is where some brands get sloppy. Email permission and SMS permission are not the same thing.
Klaviyo's SMS compliance overview covers consent, quiet hours, program naming, and opt-out expectations. Read the SMS compliance basics before building any cross-channel trigger.
Compliance is not the growth hack. It is the permission to keep playing.
How do you know if the SMS trigger worked?
The SMS trigger worked if total campaign clicks and profitable purchases increased without a concerning rise in opt-outs or complaints. Do not judge it by SMS revenue alone.
This is a common attribution mistake. The text may send people back to the email, then the email gets the click or sale. If you only look at SMS attributed revenue, you may undercount the value of the trigger.
Measure the whole campaign window:
- Email click rate before and after SMS
- Total clicks across email and SMS
- Revenue per recipient
- Incremental purchases during the trigger window
- SMS opt-out rate
- Repeat purchase behavior from the segment
In the client example, the simple read was enough: email click rate moved from 5% to 14%. That told us attention changed.
What is the right cross-channel rule?
The right rule is simple: email explains, SMS interrupts carefully, and both channels should respect customer intent. If SMS does not add urgency or usefulness, leave it out.
I like SMS when it plays a specific job. A reminder. A deadline. A high-intent nudge. A back-in-stock alert. A launch prompt.
I do not like SMS as a second inbox for mediocre campaigns.
The click-rate jump was real. But the reason it worked was not magic. The offer mattered. The timing made sense. The audience had intent. The text was short enough to be useful.
That is the playbook.
FAQ
Can you text your email list?
Only if those customers separately gave SMS consent. Email consent does not automatically create SMS permission.
Should every email campaign have an SMS reminder?
No. Use SMS for high-intent, time-sensitive, or important campaigns. Overusing SMS can increase opt-outs and reduce trust.
Should the SMS link to the email or the product page?
Usually link to the most direct action. For launches or offers, that may be the collection or product page. The message can still reference the email.
How long should you wait after the email before sending SMS?
A 2 to 6 hour delay is a useful starting point. The right timing depends on the campaign deadline, audience behavior, and send time.
