# Emails Going to Spam Even When SPF, DKIM and DMARC Pass

URL: https://warmerly.com/blog/emails-go-to-spam-when-spf-dkim-dmarc-pass
Published: 2026-10-14
Reading time: 7 minutes
Tags: Deliverability, Troubleshooting, Cold email

> Passing SPF, DKIM and DMARC proves who you are, not that you are trusted. Seven reasons authenticated cold email still lands in spam, and what to check.

SPF, DKIM and DMARC prove that a message really came from your domain. They do not prove that the domain is trusted, so a fully authenticated email can still go to spam. When authentication passes, the cause is almost always reputation (a young or unwarmed domain, complaints, bounces), content and links, or your own sending pattern.

> **How this was checked**: Google's published sender guidelines say to keep the reported spam rate below 0.1 per cent and never reach 0.3 per cent. The rest of this page is diagnostic reasoning, not research. We do not quote an inbox rate, because we have no study to cite and no public figure would be reliable for your domain.

## 1. The domain is new or has gone quiet

A domain with no sending history has no reputation, and filters treat no history as a reason for caution. Authentication passes, trust does not exist yet. Warming up gives the domain a record of normal behaviour: small volumes, replies, rescued messages. See how long warmup takes for the ramp.

## 2. People are marking you as spam, or ignoring you

Spam complaints, deletes without reading and low engagement all feed reputation. A list that does not know you will complain more than one that does. Google Postmaster Tools shows your reported spam rate for a domain once you send enough volume to Gmail. Keep it under the 0.1 per cent guideline.

## 3. Bounces from a poor list

Sending to addresses that do not exist is a sign of a scraped or stale list. Verify addresses before sending and remove hard bounces after the first one. The bounce rate post covers sensible limits.

## 4. A tracking or link domain with a poor record

Your message may be clean while the link domain in it is shared with thousands of other senders. A shared tracking domain inherits their problems. A custom tracking domain on your own domain removes that dependency. Warmerly checks a custom tracking domain's DNS records when you set one up.

## 5. The domain or IP is on a blocklist

A listing on a major blocklist can send mail to spam or reject it outright, with every authentication check still passing. Look up the sending domain and IP. See Spamhaus delisting by list type for what to do next.

## 6. Content and pattern

- The same message to hundreds of people in one burst, with only the name changed.
- Heavy HTML, many links, large images, or an image-only message.
- Spam-trigger wording in the subject line. A spam word checker can flag obvious ones, but a flagged word alone rarely decides placement.
- A sudden jump in volume from a mailbox that was sending little.

## 7. Authentication passes, but not aligned

SPF and DKIM can pass for your sending tool's domain while neither matches your From address. Check the headers for dmarc=pass, not just spf=pass and dkim=pass. See how to read email headers.

## What to do first

1. Send a few messages to mailboxes you control at Gmail and Outlook and see where they land. The free inbox or spam test post explains how to do that without paying.
2. Open the headers and confirm dmarc=pass.
3. Check the domain and IP against blocklists.
4. Look at your bounce and complaint numbers. If either is rising, pause and fix the list before anything else.
5. If the domain is young, slow down and warm it up before ramping volume.

**Tools and related guides**
- [Free blacklist checker](https://warmerly.com/blacklist-checker)
- [Free deliverability checker](https://warmerly.com/deliverability-checker)
- [Free spam word checker](https://warmerly.com/spam-word-checker)
- [How long does email warmup take?](https://warmerly.com/email-warmup/how-long)
- [Test inbox or spam for free](https://warmerly.com/blog/test-cold-email-inbox-or-spam-free)

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