· Cyber Resilience · 4 min read
Why are my business emails going to spam?
If customers aren't receiving your emails, the problem may not be your inbox. Discover how simple email security checks can improve deliverability, protect your reputation, and reduce cyber risk.
Most organisations rely on email every day - Quotes, Invoices, Customer enquiries, Marketing campaigns, or Supplier communications.
Yet many businesses never stop to ask one important question: Are our emails actually reaching our customers?
If messages are landing in spam folders, or not arriving at all, it could be costing your organisation opportunities without you even realising. The good news is that many email delivery problems are straightforward to identify and often surprisingly simple to fix.
Why do business emails end up in spam?
Modern email providers such as Microsoft 365, Google, and Yahoo don’t just look at the content of an email. They also assess whether the email genuinely comes from the organisation claiming to have sent it. To help make that decision, they use several technical checks behind the scenes.
If those checks fail, or haven’t been configured correctly, your emails are more likely to be treated as suspicious. That can result in:
- Emails being delivered to spam or junk folders.
- Customers never receiving quotations or invoices.
- Reduced response rates from marketing campaigns.
- Missed business opportunities.
- Clients insisting they “never received your email.”
Often the problem isn’t your email itself. It’s the security settings behind your domain.
Why does this happen?
Many businesses have changed technology over the years. Perhaps you’ve:
- Moved to Microsoft 365.
- Changed website providers.
- Started using a marketing platform.
- Introduced a CRM system.
- Migrated email hosting.
Each change may have required updates to your email authentication settings. Sometimes they’re updated correctly, sometimes they’re duplicated, sometimes they’re forgotten altogether. Over time, these small changes can affect whether your emails are trusted.
You’re not alone, most organisations fall into 1 of 5 groups:
- I didn’t know email security existed.
- I assumed it was configured automatically.
- I tried to set it up but became confused.
- I attempted it, got it wrong and gave up.
- I don’t know what I don’t know.
If any of those sound familiar, you’re certainly not alone. Email authentication can sound highly technical, but checking whether everything is working correctly is much easier than many people expect.
A free check from the National Cyber Security Centre
The National Cyber Security Centre (NCSC) provides a free Email Security Check that allows you to review some of your domain’s email security settings. The check only takes a couple of seconds. It can help identify whether common issues are affecting the trustworthiness of emails sent from your organisation.
How to Run the Free NCSC Email Security Check
- Visit the NCSC Email Security Check.
- Enter your organisation’s domain name (for example,
yourcompany.co.uk). - Run the scan.
- Review the results.
- Save or take a screenshot for future reference.
If the results identify issues, don’t panic. Many organisations discover configuration problems simply because email systems, websites, or suppliers have changed over time. Most common issues can be corrected quickly by whoever manages your domain, website, or Microsoft 365 environment.
Understanding the Results
The report may return one of several common outcomes:
Configured ✅
Good news. Your email authentication appears to be configured correctly. While this doesn’t guarantee every email will reach the inbox, it’s an excellent foundation.
Multiple Records ⚠️
You should normally only have one SPF record. Multiple SPF records are surprisingly common and can prevent receiving email servers from validating your messages correctly.
Missing ⚠️
No SPF record has been detected. If your organisation sends email from its own domain, this is worth investigating.
No Value ⚠️
No email authentication settings have been identified. This may indicate they have never been configured or were removed during previous system changes.
Invalid Email ⚠️
Something appears to be misconfigured. This doesn’t necessarily mean your email isn’t working, but it should be reviewed to ensure messages are being authenticated correctly.
Exempt ℹ️
This usually means the domain is not intended to send email.
Can You Fix It Yourself?
In many cases, yes. Many common email authentication issues can be resolved in less than 30 minutes by the person who manages your website, domain name or Microsoft 365 environment. If you’re unsure what the results mean:
- Take a screenshot.
- Keep a copy of the report.
- Ask someone to explain the findings in plain English.
You don’t need to become an email expert. You simply need confidence that your customers are receiving the messages you send.
Why This Matters
Email authentication isn’t only about preventing criminals from impersonating your business. It also helps:
- Improve email deliverability.
- Increase customer confidence.
- Protect your business reputation.
- Reduce successful phishing attacks.
- Support wider cyber resilience.
Small improvements to email security can make a significant difference to how your organisation communicates. Most organisations don’t discover there’s a problem until a customer says: “I never received your email.”
By then, an opportunity may already have been lost. Fortunately, checking your email security takes only a few minutes and could improve both your cyber resilience and the reliability of your business communications.
Sometimes the simplest checks provide the greatest reassurance.
Need Support?
Not sure what your email security results mean?
White Rock Advisory provides practical, independent cyber resilience guidance to help organisations understand their risks, improve email security and strengthen their overall cyber resilience.