Why Shopify Emails Go to Spam: How to Check SPF, DKIM and DMARC Before It Costs You Sales

You can spend hours improving your Shopify store, writing better product pages and polishing every customer email.

But none of that matters much if the email never reaches the inbox.

Order confirmations, shipping updates, password emails and marketing campaigns can quietly start landing in spam — sometimes without the store owner noticing for days or even weeks.

That is what makes email deliverability frustrating. There is rarely a big red warning inside your Shopify admin saying something is wrong.

The emails simply stop arriving where they should.

And in many cases, the problem has nothing to do with the actual content of the email.

It starts with your domain.

Why Shopify emails can end up in spam

Email providers such as Gmail, Outlook and Yahoo do not automatically trust every message they receive.

Before deciding whether an email belongs in the inbox, spam folder or should be rejected entirely, they look at several signals.

One of the most important is whether the sender can prove that the email genuinely comes from the domain shown in the From address.

That is where SPF, DKIM and DMARC come in.

They sound technical, but the basic idea is straightforward.

SPF

SPF tells email providers which systems are allowed to send email on behalf of your domain.

For a Shopify merchant, problems can appear when the SPF record is missing, incorrectly configured or does not properly account for the services being used to send email.

DKIM

DKIM adds a cryptographic signature to outgoing emails.

The receiving provider can use that signature to check whether the message genuinely came from an authorised sender and whether it was altered along the way.

If DKIM is missing or broken, the email loses an important trust signal.

DMARC

DMARC sits on top of SPF and DKIM.

It tells receiving providers what they should do when an email fails authentication checks and can also provide reports that help domain owners see whether someone else is trying to send email using their domain.

A badly configured or missing DMARC policy does not automatically mean every email will go to spam, but it is another piece of the deliverability puzzle.

The frustrating part: everything can look normal

This is what catches many store owners out.

Your Shopify store can be working perfectly.

Orders are coming in.

Customers can browse and check out.

Your email templates look fine.

You press send and Shopify reports no obvious error.

Yet customers start saying:

“I never received my confirmation.”

Or:

“It was in spam.”

One customer saying that is easy to ignore.

When several start saying it, there may already be a technical problem behind the scenes.

It can be caused by an authentication record disappearing, a DNS change, a sender address not aligning correctly with the domain or another deliverability issue.

And because DNS records are usually managed somewhere completely separate from Shopify, finding the problem is not always obvious.

You should not need to become a DNS expert

This is one of the reasons we built MailMedic.

MailMedic is a Shopify email deliverability health checker designed to answer a simple question:

Is my store's email setup healthy?

Instead of asking merchants to manually inspect DNS records, it checks the pieces that influence whether mailbox providers trust email from a domain.

MailMedic checks:

• SPF
• DKIM
• DMARC
• MX and domain configuration
• known blocklists
• Shopify sender configuration

The result is presented as a health score with individual checks marked as pass, warning or fail.

More importantly, the goal is not simply to tell you:

“DMARC failed.”

That is not particularly useful if you have no idea what DMARC is.

MailMedic explains what the problem means and, where a DNS change is required, shows the record details needed to fix it.

A Shopify email health check takes only a few minutes

The basic workflow is deliberately simple.

You enter the domain you use for email.

MailMedic checks its configuration and produces a list of findings.

If everything looks good, you know that the core technical setup is in place.

If something does not look right, you can see which check failed and what needs attention.

MailMedic itself does not modify your DNS or make changes to your Shopify store. It reads the relevant public records and leaves any changes in your hands.

That distinction matters.

DNS is one of those places where an automatic “Fix Everything” button can create a much bigger problem than the one it was supposed to solve.

We would rather explain the issue clearly and let the merchant remain in control.

Email deliverability is not something to check only once

A correctly configured domain today does not guarantee it will stay that way forever.

Someone can edit DNS records.

An email provider can change.

A domain can be moved.

A record can accidentally be deleted.

A previously healthy check can begin failing without anything visibly changing inside the storefront.

That is why MailMedic also includes monitoring.

Instead of repeatedly remembering to check everything yourself, MailMedic can rescan the domain and alert you when something gets worse — for example when a record disappears, a check begins failing or the overall health score drops.

The idea is not to send another daily report that eventually gets ignored.

If nothing is wrong, there is nothing you need to do.

The free check is enough for many stores

We wanted the basic email health check to be useful even if you never pay for MailMedic.

Checking one domain is free and includes the full health score, authentication checks, explanations and instructions for problems that are found.

For merchants who want to monitor additional domains and receive automatic alerts when deliverability health deteriorates, there is a Pro plan.

The current Pro price is $1.99 per month.

No enterprise pricing calculator.

No sales call.

No need to book a demo just to find out whether your SPF record is broken.

When should you check your Shopify email setup?

There are several situations where checking it makes particular sense.

If you have recently connected a custom domain, changed your email provider or edited DNS records, check it.

If customers suddenly begin saying they are not receiving emails, check it.

If marketing emails are increasingly appearing in spam, check it.

If you have never looked at SPF, DKIM or DMARC and are not entirely sure whether they are configured correctly, that is probably a good enough reason too.

Even a healthy result is useful.

At least then you can stop guessing and investigate other possible causes.

A small technical problem can become a customer problem

Email authentication is not the most exciting part of running a Shopify store.

Customers never compliment a perfectly configured SPF record.

Nobody leaves a five-star review because your DKIM signature worked.

They simply expect the email to arrive.

And that is exactly why these small technical details matter.

When everything works, nobody notices.

When it does not, suddenly you have customers asking where their order confirmation went, support tickets appearing and important messages sitting unread in spam folders.

MailMedic was built to make checking that invisible part of your Shopify store a little less painful.

Check your Shopify email health with MailMedic and find out whether SPF, DKIM, DMARC and the rest of your domain setup are working as they should.