Email Deliverability: Why Your Emails Aren’t Reaching Inboxes

Approximate length: 1,048 words
Estimated reading time: about 7 minutes (unless your troubleshooting your emails)

Key Takeaways:

Email deliverability is about whether your emails land in the inbox, not just whether they get sent
Your sender reputation matters more than your subject line
Three little records called SPF, DKIM, and DMARC do a lot of heavy lifting behind the scenes
A clean, engaged email list beats a big one every time
Small, consistent habits protect your reputation far better than one big fix

You hit send on a newsletter you spent an hour writing. Open rates trickle in and they’re terrible. Did people just not care? Maybe. Or maybe your email never even made it to their inbox in the first place. That’s email deliverability in a nutshell, and it’s one of those behind the scenes things that nobody teaches you when you start a business. You focus on writing good content, picking a nice template, and hitting send. Nobody warns you that the email itself might get quietly filtered into a spam folder or, worse, never delivered at all. Let’s fix that.

What Email Deliverability Actually Means

Deliverability isn’t the same as “did the email get sent.” Sent just means it left your server. Delivered means it actually landed in the recipient’s inbox. Deliverable means it landed in the inbox and not the spam folder. Email providers like Gmail and Outlook are constantly deciding, email by email, whether you’re trustworthy. They’re looking at your sending history, how people interact with your emails, and some technical fingerprints attached to every message you send. Get enough of those signals wrong and your emails start quietly disappearing into spam, even for people who genuinely want to hear from you.

The Three Letters That Matter More Than You'd Think

If you’ve ever poked around your website’s DNS settings and seen a jumble of letters like SPF, DKIM, and DMARC, you’ve probably scrolled right past them. Understandable. They look like alphabet soup. But they’re doing quiet, important work.

SPF (Sender Policy Framework) tells email providers which servers are allowed to send email on your domain’s behalf. Think of it as a guest list for your email address.

DKIM (DomainKeys Identified Mail) adds a digital signature to your emails that proves the message wasn’t tampered with along the way. It’s like a wax seal on a letter.

DMARC (Domain-based Message Authentication) ties the first two together and tells email providers what to do if a message fails those checks. Reject it? Flag it? Let it through anyway?

Together, these three records prove you are who you say you are. Without them, your emails look a little suspicious to providers, even if your intentions are perfectly innocent. If you’re using a platform like MailerLite, Mailchimp, or similar, they’ll usually walk you through setting these up. It’s worth the twenty minutes.

Your Sender Reputation Is Basically a Credit Score for Email

Every domain and email address builds up a reputation over time based on how people respond to your messages. Do people open them? Click on them? Mark them as spam? Delete them without reading? Providers use all of that to decide how much they trust you going forward. A good reputation means your emails keep landing in inboxes. A shaky one means providers start routing you straight to spam, just in case. The tricky part is that reputation is slow to build and fast to damage. One big blast to an old, unengaged list can undo months of good habits.

Common Ways Small Businesses Accidentally Hurt Their Deliverability

None of these are dramatic mistakes. They’re small, understandable habits that add up.

Buying or scraping email lists. People who never opted in are far more likely to mark you as spam, and that hurts your reputation fast.
Never cleaning your list. Old, inactive subscribers drag down your engagement rates even if they’re not actively complaining.
Inconsistent sending. Blasting three emails in a week after months of silence can look suspicious to providers.
Spammy subject lines. ALL CAPS, excessive exclamation points, and words like “free” or “act now” can trigger spam filters.
Skipping the technical setup. Not having SPF, DKIM, or DMARC configured leaves you more exposed than you’d think.
Ignoring unsubscribes. Making it hard to unsubscribe just pushes people toward the spam button instead, which hurts you far more.

Simple Habits That Actually Help

Send consistently. A predictable rhythm, weekly, biweekly, monthly, tells providers you’re a legitimate, regular sender.
Clean your list regularly. Remove people who haven’t opened anything in six months or more. A smaller, engaged list beats a bloated, silent one.
Make unsubscribing easy. It feels counterintuitive, but a clear unsubscribe link keeps your list healthy and your reputation intact.
Warm up new domains slowly. If you’re sending from a brand new email domain, start small and build up volume gradually rather than blasting your whole list on day one.
Watch your engagement, not just your list size. A thousand engaged subscribers will always outperform ten thousand who never open a thing.

When to Bring in Some Help

Some of this you can absolutely handle yourself, especially the day to day habits like list cleaning and consistent sending. But the technical setup, getting SPF, DKIM, and DMARC configured correctly on your domain, can get fiddly fast, especially if your website and email are hosted in different places. One typo in a DNS record and things stop working the way they should. If you’re not sure whether your domain is set up correctly, or your open rates have quietly tanked and you can’t figure out why, that’s a good sign it’s time for a second set of eyes.

Wrapping Up

Email deliverability isn’t glamorous, and it’s easy to ignore until your open rates start telling on you. But a little attention to your list health, your sending habits, and those three funny looking DNS records can make a real difference in whether your emails actually get seen. If you’ve checked your settings and you’re still stuck, or you’d rather just hand this one off, get in touch with Digital Chicks. We’ll take a look under the hood and get things sorted so your emails land where they belong.

FAQs

What's the difference between email deliverability and email delivery?

Delivery just means the email arrived somewhere, even if that’s the spam folder. Deliverability means it landed in the actual inbox where someone will see it.

What if I don't know my exact brand colours?

If you have a logo file, most design tools (including Canva) can pull the hex code directly from the image. If your website was custom built, whoever built it may be able to pull the codes from the site’s style sheet as well.

Do I need SPF, DKIM, and DMARC if I only send occasional emails?

Yes. Even infrequent senders benefit from having these set up, since providers check them on every email regardless of how often you send.

Why did my open rates suddenly drop?

This can happen after a large unengaged list gets emailed, a spammy-sounding subject line, or a technical issue with your domain’s authentication records. Checking your list health and DNS settings is a good first step.

Can I check my own deliverability?

Yes, several free tools let you send a test email and get a report on your SPF, DKIM, and DMARC status along with a general deliverability score.

Does using a personal Gmail or Outlook address to send bulk emails hurt deliverability?

It can. Personal inboxes aren’t built for bulk sending and providers may flag the activity, which can affect that address’s reputation over time.

Cyndi Fleming-Alton

Cyndi is the founder of Digital Chicks and has spent 20 years helping mission-driven entrepreneurs build sustainable revenue and create meaningful impact.

Endlessly curious (and proudly interdisciplinary), she holds degrees in Computer Science, Human Resources, Emergency Management, and Information Privacy - balanced with studies in Reiki, Sound Therapy, and Meditation. Her work spans all levels of Canadian government, healthcare, and the private sector in IT and communications, including a year in Africa as a research coordinator and photographer.

A lifelong digital nomad, Cyndi has lived and worked in several countries and now calls Ontario, Canada home, where she enjoys a slightly hippie lifestyle with her partner and an assortment of four-legged co-workers.

Tagged Blog