Why Your Emails Land in Spam (And the Fixes That Work)

The quiet tax on every email you send

Open rate is measured against emails that arrived. It says nothing about the ones filtered before anyone saw them. A campaign showing a respectable open rate can still be losing a chunk of its audience to the spam folder, invisibly, every send.

Industry measurement puts average inbox placement somewhere in the high eighties, meaning roughly one in eight commercial emails never reaches the inbox at all. That is money removed before the copy gets a chance.

The rules changed in 2024 and most senders never noticed

In February 2024, Gmail and Yahoo introduced enforced requirements for bulk senders. They are now the baseline for everyone. Google's sender guidelines require:

1. SPF and DKIM authentication on your sending domain, proving the mail is really from you.
2. A DMARC record, telling receivers what to do with mail that fails those checks.
3. One click unsubscribe in the header, honoured within two days.
4. A spam complaint rate below 0.3%, measured in Google's Postmaster Tools.

The 0.3% figure is the ceiling, not the target. Healthy programs run below 0.1%. Cross the line and delivery does not degrade politely, it collapses.

The five point setup check

• Send from your own domain, never from a free address. Mail claiming to be from gmail.com but sent by your platform fails authentication outright.
• Verify SPF, DKIM, and DMARC are all passing. Send a test to a Gmail account, open the message, and check the details. Your email platform documents this in a page you can follow.
• Use a subdomain for marketing mail so a bad campaign cannot damage the reputation of your invoices and replies.
• Register with Google Postmaster Tools. It is free and it is the only honest view of your complaint rate and reputation.
• Warm new domains slowly. A brand new domain sending five thousand emails on day one looks exactly like an attack. This matters even more for outbound, as covered in the cold email benchmarks and our outreach playbook.

The habits that keep you in the inbox

Never buy a list. Purchased addresses generate complaints and hit spam traps, and the damage outlasts the campaign.

Clean the list on a schedule. Remove people who have not opened in six months. A smaller engaged list delivers better than a large dead one, and the returns still favour email over almost everything.

Make unsubscribing easy. People who cannot find the link press the spam button instead, and that button is the expensive one.

Send at a predictable rhythm. Silence for eight months followed by a blast reads as a compromised account.

Write like a person. Excessive capitals, image only emails, link shorteners, and urgent payment language all trip filters that were built for actual fraud.

If you are already in spam

Stop sending to the whole list. Cut down to people who opened in the last ninety days, fix authentication, and rebuild volume gradually over a few weeks with content people genuinely want. Reputation recovers slowly, and only for senders whose recent mail earns engagement. If your platform is stitched together, this is usually the moment to rebuild the automation properly.

Frequently asked

Does adding images or links hurt delivery? Not in reasonable amounts. Image only emails with one giant link do.

Is a dedicated IP better? For most small senders, no. Shared IPs from a reputable platform carry better reputation than a cold IP you must warm alone.

Can Fixora fix our deliverability? Yes: authentication setup, list cleaning, warm up, and monitoring so you can see placement rather than guess. Send us your setup and get a diagnosis within 48 hours.