Email deliverability for small businesses: arriving at all

Introduction

You can write an excellent email to a willing subscriber and have it silently filed in a junk folder. Nothing in your reporting will tell you clearly that this happened.

Deliverability is the unglamorous foundation underneath every other email decision, and it is largely technical and largely fixable. Most small businesses have never looked at it.

1. Email deliverability for small businesses is decided before the content

Mail providers judge whether to accept your message using signals that have nothing to do with what it says.

Whether your domain is authenticated, your sending history, how recipients have treated your previous mail, and how many addresses bounce. Improving your writing will not help if these signals are poor.

2. Authenticate your domain properly

This is the single most important technical step and it is frequently skipped.

The three standard records — SPF, DKIM and DMARC — tell receiving servers that your mail genuinely comes from you. Unauthenticated mail is increasingly rejected outright by the major providers, and this is a one-off setup task rather than ongoing work.

3. Send from your own domain, not a free address

Using a free consumer email address as the sender of bulk mail is now effectively unworkable.

Those providers publish policies that instruct receiving servers to reject mail claiming to be from them but sent elsewhere. Send from your own domain, which you can authenticate and whose reputation you actually own.

4. Keep the list clean, because bounces do real damage

Invalid addresses are among the strongest negative signals there are.

Remove hard bounces immediately and permanently, verify lists before importing them, and never send to an address that has already failed. A high bounce rate on a single campaign can affect your delivery for weeks afterwards.

5. Remove people who never open anything

Engagement is now a primary factor in filtering decisions.

Providers observe whether recipients open, reply, delete unread or file as spam. A list where most subscribers ignore everything teaches the provider that your mail is unwanted, which then affects the subscribers who do want it.

6. Send consistently rather than in sudden bursts

Erratic patterns look like the behaviour of a compromised account.

Nothing for eight months and then twelve thousand messages in an afternoon is a classic spam signature. A regular, predictable volume builds reputation, and any significant increase should be introduced gradually.

7. Make unsubscribing easy, because the alternative is worse

Hiding the unsubscribe link is counterproductive in a way that surprises people.

A subscriber who cannot find it will mark the message as spam instead, which is far more damaging than an unsubscribe. A clear one-click link protects your reputation and is a legal requirement in most jurisdictions.

8. Avoid the patterns that resemble spam

Some content characteristics do genuinely affect filtering.

Misleading subject lines, all-image emails with no text, link shorteners, excessive capitals and exclamation marks, attachments, and links to domains with poor reputations. None of these will save a badly authenticated sender, but they will sink a good one.

9. Monitor whether your mail is actually arriving

You cannot manage this without visibility.

Use your platform's bounce, complaint and engagement reporting, check the free postmaster tools the large providers offer, and send test messages to accounts on the main services. A quiet decline in performance is frequently a delivery problem rather than a content one.

Conclusion

Fix the foundations, because an unauthenticated sender with a dirty list cannot be rescued by better copywriting.

Set up SPF, DKIM and DMARC, send from your own domain rather than a free address, remove hard bounces immediately, suppress subscribers who never engage, keep your sending volume consistent and increase it gradually, make unsubscribing obvious so people do not report you instead, avoid the content patterns filters treat as suspicious, and monitor bounce, complaint and engagement data so a delivery problem is not mistaken for weak content.

Related reading

• Writing a welcome email sequence while they still care

• Cyber cover for a business that holds customer data at all

• Data on personal phones and laptops nobody controls

• Following up by phone rather than email when writing has failed

• Protecting a business from fraud that arrives by email