Why Is My Email Going to Spam? (And How to Fix It in 2026)
Why Is My Email Going to Spam? The Short Answer
Your email is going to spam because it failed one or more of three filters: technical authentication (SPF, DKIM, DMARC), sender reputation (bounce rate, complaint rate, domain age), or content scoring (spam trigger words, broken HTML, bad link practices). Spam filters score every outgoing message against all three categories before a human ever reads it, and failing any one of them can get your email filtered automatically.
The three root causes you'll see most often are missing or broken SPF, DKIM, and DMARC records; a damaged sender reputation built up from high bounce or complaint rates; and content that trips keyword or formatting thresholds. According to Valimail's research on email deliverability, authentication failures alone are now sufficient grounds for automatic spam placement after Google and Yahoo introduced mandatory bulk sender requirements in February 2024. That means if your DNS records aren't set up correctly, the content of your email is almost irrelevant.
What makes this harder to catch is that most businesses don't realise their domain has been silently filtered for weeks. You might only notice when open rates start sliding or replies stop coming in.
Fixing a spam problem means addressing technical setup, list hygiene, and content strategy at the same time. Patching one layer while ignoring the others rarely resolves the issue, and it's why so many businesses stay stuck in the spam folder even after making changes.
We see this constantly at Tactycs, businesses that "fixed" their SPF record months ago and still can't figure out why open rates haven't recovered, because the reputation and content layers never got addressed.
If you're newer to email as a channel, our guide on Getting Started with Email Marketing covers the fundamentals before you work through the fixes below.
What You Need to Check Before You Start Fixing
Before you change anything, get a baseline.
Run your sending domain through a free inbox placement test such as Mail-Tester or MXToolbox to see a deliverability score and find out exactly which checks are failing. This saves you from fixing the wrong thing first.
Next, log into your DNS provider (whether that's GoDaddy, Cloudflare, Namecheap, or something else) and confirm you have access to add or edit TXT records. You'll need that access to set up SPF, DKIM, and DMARC, so don't skip this step. As Microsoft's guidance on fixing spam placement notes, many senders discover they don't actually control their own DNS, which adds a delay before any fixes.
Identify which email sending platform you're using because authentication setup steps differ per platform. The process in a CRM-based tool looks different from a standalone email service provider, so you'll want your platform's specific documentation alongside the general steps below.
Pull your last 30 days of sending metrics: open rate, bounce rate, unsubscribe rate, and spam complaint rate. A complaint rate above 0.1% is Gmail's published threshold that triggers automatic spam placement for bulk senders, so this number alone tells you a lot about where you stand. Valimail confirms that complaint rate is one of the most heavily weighted signals in Gmail's filtering system.
Also check whether your sending IP is shared or dedicated. Shared IPs can be damaged by other senders on the same pool without you doing anything wrong, which is a common source of unexplained deliverability drops. Verify your domain has been active for at least 30 days because brand-new domains have no sender history and are treated as high-risk by default. Finally, confirm your email platform is DKIM-signing outgoing messages. Unsigned messages fail a core 2024 Google and Yahoo requirement, and Twilio's deliverability research shows this is one of the most frequently missed setup steps among small business senders.
For tracking your sending metrics and engagement signals over time, our guides on setting up goals in Google Analytics and using Google Tag Manager for digital marketing tracking will help you build a proper measurement foundation.
Feeling overwhelmed already? That's six separate things to check before you've fixed a single issue — and most business owners don't have DNS access memorized or know their complaint rate off the top of their head. Tactycs' managed email marketing service runs this full diagnostic for you and tells you exactly which of the three layers (authentication, reputation, or content) is causing your specific problem.
How to Stop Your Emails Going to Spam: 8 Fixes That Actually Work
To stop emails going to spam, you need to complete all three authentication steps (SPF, DKIM, DMARC), clean your list to keep complaint rates below 0.1%, and remove content patterns that score poorly in spam filters. Here's how to do each one.
Step 1: Publish a valid SPF record
Add a TXT record to your DNS in the format v=spf1 include:[yourESP].com ~all, replacing [yourESP] with your email service provider's domain. This record explicitly tells receiving mail servers which servers are authorised to send email on behalf of your domain. Without it, there's no way for a receiving server to verify your message is legitimate, and Google's own support forum discussions show that missing SPF is one of the most cited reasons for deliverability failures.
Step 2: Enable DKIM signing
DKIM attaches a cryptographic signature to every outbound email that proves the message wasn't altered in transit. Most email service providers generate a DKIM key in their settings panel that you paste into your DNS as a TXT record. This is a non-negotiable step for 2026. As Valimail explains, unsigned messages are now treated with deep suspicion by every major inbox provider.
Step 3: Set up a DMARC policy
Publish a DMARC TXT record starting with v=DMARC1; p=none; to begin in monitoring mode. Once you've confirmed all legitimate mail is passing SPF and DKIM, graduate to p=quarantine and eventually p=reject. Google and Yahoo's 2024 requirements made DMARC mandatory for bulk senders, per Microsoft's deliverability documentation, and its absence alone can push your emails into spam.
A word of caution on DMARC: graduating from monitoring mode to enforcement without watching your reports first can silently block legitimate mail — your own invoices, your CRM notifications, your booking confirmations. This is the step we see businesses get wrong most often when self-managing. If you'd rather have someone monitor the transition and confirm nothing legitimate gets blocked before enforcing, that's exactly what Tactycs' email management handles as part of ongoing deliverability monitoring — not just a one-time DNS fix.
Step 4: Warm up new domains and IPs gradually
Start sending to your most engaged subscribers first, and increase volume by no more than 10 to 20% per day. Jumping from zero to thousands of emails in a single batch is a primary spam signal for ISPs. This step is especially relevant if you've recently migrated to a new sending domain or IP address.
Step 5: Clean your email list
Remove hard bounces immediately after they occur. Suppress unsubscribes within 10 business days (the CAN-SPAM legal maximum). Delete or run a re-engagement sequence for contacts who haven't opened an email in 90 or more days. List hygiene is one of the most direct ways to protect your sender reputation, and our guide on how to build an email database for your small business covers the principles for collecting the right contacts from the start.
Step 6: Fix content-level spam triggers
Avoid subject lines written in all caps or loaded with exclamation marks. Keep your image-to-text ratio above 60% text. Limit outbound links to fewer than three per email, remove URL shorteners entirely, and make sure every link points to a reputable domain. The r/email community on Reddit consistently flags link quality and image-heavy design as the content issues that trigger filters most reliably.
Thinking about content quality more broadly, Twilio's spam prevention guide recommends writing email copy that reads like a message from a real person, not a broadcast. Our resources on creating content for each stage of the buyer's journey and the complete guide to the buyer journey are useful for making your email content feel relevant and targeted rather than generic. The same content quality principles we cover in our guide on how to write SEO-friendly blog posts apply equally to email, because clear, structured writing scores better with filters and with readers.
Step 7: Include a one-click unsubscribe link and honour it within 2 days
This is a hard requirement under Google and Yahoo's 2024 sender rules. Its absence alone can trigger filtering at Gmail and Outlook, regardless of how good your content is. The unsubscribe process must be a single click, not a form with multiple confirmation steps.
Step 8: Run a re-engagement campaign before purging cold subscribers
Send a short sequence to inactive contacts asking if they still want to hear from you. Those who don't re-engage should be suppressed. This reduces complaint rates and signals to ISPs that your list is permission-based and actively maintained.
Two additional platform-specific notes worth keeping in mind: Gmail uses a machine-learning-based filtering system that evaluates hundreds of signals simultaneously, meaning no single fix is guaranteed to resolve everything in isolation. Outlook's Microsoft Defender filter places heavy weight on IP reputation and domain age, which often causes it to over-filter legitimate small business email that hasn't yet built sufficient sending history. And because Apple Mail's privacy features inflate open rates from Apple Mail users, you should use click rate as your primary engagement metric when diagnosing spam placement, not opens.
For beginners who want an overview of the tools involved, our easy digital marketing tools for beginners guide touches on email platforms that have built-in deliverability support.
Pro Tips to Keep Your Emails Out of Spam Long-Term
Getting out of spam is one challenge. Staying out is another. These practices will protect your deliverability over the long run.
Use double opt-in for all new subscribers. Confirmed opt-in lists consistently generate complaint rates below 0.02%, far under the 0.1% Gmail threshold, because every contact has actively confirmed they want your email. It's the single most effective list management decision you can make, and Twilio's research backs this up with data across large sending volumes.
Send from a recognisable, consistent "From" name and email address. ISPs treat senders who rotate display names or domains as suspicious, and subscribers who don't recognise the sender mark emails as spam at much higher rates. Pick one identity and stick to it.
Monitor your domain's blacklist status weekly using a free tool like MXToolbox Blacklist Check. A single blacklisting can destroy deliverability quickly, and you may not notice until open rates collapse. Catching it early means a faster recovery. Valimail's deliverability research shows that blacklisting is often the invisible culprit behind persistent spam folder placement even after authentication is correctly configured.
Segment your list by engagement level and send your most promotional content only to your most active subscribers. This concentrates high engagement signals on your sending domain and protects your overall sender reputation. It's a strategy that fits naturally into a well-structured end-to-end marketing strategy for small businesses and connects to the best content marketing platform strategy and tools you choose to run your campaigns.
Authenticate a custom tracking domainin your email platform so click-tracking links use your own domain rather than a shared platform domain. Shared tracking domains are frequently blacklisted by other senders using the same platform, and that contamination can drag your results down.
Establish a verified Google Business Profile to build external trust signals around your business domain. Email clients factor in the credibility of the sending organisation, and a verified business presence contributes to those signals. Our 12-step guide to setting up Google My Business walks you through that process.
Finally, review your full marketing tech stack to make sure every tool sending automated email on your behalf, including CRMs, booking tools, and e-commerce platforms, is included in your SPF record and sending DKIM-signed mail. Many businesses discover a forgotten tool is the source of their deliverability problems.
If managing SPF, DKIM, DMARC configuration, list hygiene, domain warm-up, and ongoing monitoring feels like too much to handle alongside running your business, Tactycs handles all of this as part of its managed email marketing service — and deliverability is only useful if the emails themselves are converting once they land. That's why we build email as one piece of a full marketing system rather than in isolation: your list segmentation, your paid ads retargeting the same audience, your SEO content feeding the same funnel. A technically perfect email that never gets fixed against your broader strategy is still a wasted send. Start with a free marketing audit and we'll tell you whether deliverability, content, or strategy is actually your bottleneck.
Frequently Asked Questions About Emails Going to Spam
How do I stop my mail from going to spam?
To stop your mail from going to spam, you need to address three layers at once. First, set up proper email authentication by publishing SPF, DKIM, and DMARC DNS records for your sending domain. These prove to receiving servers that your emails are legitimate. Second, protect your sender reputation by keeping your spam complaint rate below 0.1% (Google's 2024 threshold), removing hard bounces immediately, and suppressing unengaged contacts. Third, clean up your email content by avoiding all-caps subject lines, excessive links, URL shorteners, and image-heavy layouts with minimal text. Most spam problems persist because senders fix one of these layers and ignore the others. All three must be addressed together for lasting inbox placement.
How do I stop my email from showing up as spam?
Your email shows up as spam because it's failing one or more of the checks that inbox providers like Gmail, Outlook, and Apple Mail run on every incoming message. The fastest wins are: verify your SPF and DKIM records are published and passing using a free tool like MXToolbox; add a DMARC record if you don't have one (Google and Yahoo made this mandatory in 2024 for bulk senders); include a one-click unsubscribe link in every marketing email and honour removals within 2 days; and remove any contacts from your list who haven't engaged in 90 or more days to bring your complaint and bounce rates down. If you're sending from a new domain, start with small volumes under 500 emails per day and increase gradually over 4 to 6 weeks to build a sending history that ISPs trust. Google's Gmail support thread and community discussions on Reddit both highlight these steps as the highest-impact starting points.
What is the Gmail spam complaint rate threshold in 2026?
Gmail's published threshold is 0.10%. If your spam complaint rate exceeds this level, Gmail will automatically route your messages to the spam folder. Google recommends keeping your complaint rate below 0.08% as a safety buffer. These thresholds became enforceable requirements for bulk senders (those sending 5,000 or more emails per day to Gmail addresses) when Google and Yahoo updated their sender requirements in February 2024. At 0.08%, Gmail begins showing warnings. At 0.10%, spam routing becomes automatic. Valimail's analysis of these thresholds confirms they apply at the sending domain level, not just per campaign.
Does SPF, DKIM, or DMARC affect whether my email goes to spam?
Yes, significantly. SPF authorises which mail servers can send on behalf of your domain. DKIM adds a cryptographic signature that proves the message wasn't tampered with in transit. DMARC ties both together and tells receiving servers what to do when a message fails either check. All three records are now mandatory for bulk senders under Google and Yahoo's 2024 sender requirements. Missing even one doesn't guarantee spam placement for every message, but it substantially increases your spam scoring across all major inbox providers.
Why are my emails going to spam even though I'm not a bulk sender?
Even individual or low-volume senders can land in spam. The most common reasons include sending from a brand-new domain with no reputation history, a previously blacklisted IP address (especially common on shared hosting), content that triggers filter keywords, broken HTML or missing plain-text versions of the email, or the recipient's inbox provider flagging your address based on prior behaviour from other users. Run your email through Mail-Tester before your next send to identify which specific checks are failing.
Should I fix email deliverability myself or hire an agency?
If you're comfortable editing DNS records and have time to monitor complaint rates and DMARC reports weekly, self-managing is doable. Where most businesses get stuck is the ongoing part — deliverability isn't a one-time fix, it degrades again if list hygiene and monitoring lapse. Tactycs' managed email service handles authentication, list hygiene, and content strategy together on an ongoing basis, which is usually the difference between a temporary fix and a permanent one.
