Are your business emails going to spam when customers are expecting a quotation, booking confirmation or newsletter? Start by identifying which messages are affected, then check the sender details, authentication, mailing list and unsubscribe process.
For a Nigerian small business, the investigation should cover everyday correspondence as well as messages sent through your website or email-marketing platform. Test each route separately before paying for a replacement service.
The following checklist is a suggested troubleshooting routine. It helps you gather useful evidence and ask technical support specific questions.
Table of Contents
1. Identify the Messages Affected
Choose a recent example and record:
- The sending address and the system used to send it.
- The recipient’s email provider.
- The date, time and subject.
- Whether it reached spam, returned an error or simply received no reply.
- Any recent change to your domain, hosting, website forms or email platform.
A bounce means a message could not be delivered. Mailchimp distinguishes permanent failures from temporary problems, such as an unavailable mailbox, in its explanation of email bounces. Spam-folder placement is a different outcome.
Do not treat silence as proof of a delivery problem. Ask a willing recipient to check where the message arrived.
2. Review Your Sender Details
Check the name, address and reply destination visible to the recipient.
Use a recognisable business or staff name. Send a reply to your own test message and confirm that it reaches a monitored inbox. Check for spelling errors and unexplained differences between the identity used on your website and in your emails.
For subject lines, describe the actual message. Avoid pretending a new promotional email is an existing conversation.
Google’s sender guidelines require accurate sender information and warn against misleading “Re:” or “Fwd:” subjects.
For example, “Your requested catering quotation” is appropriate when someone requested that quotation. It should not introduce an unsolicited sales pitch.
3. Ask for SPF, DKIM and DMARC Checks
Email authentication helps receiving systems assess whether a message is authorised to use a domain.
The three terms to recognise are:
- SPF: identifies servers authorised to send for a domain.
- DKIM: adds a verifiable digital signature.
- DMARC: checks alignment with the visible From domain and provides policy and reporting instructions.
See Cloudflare’s explanation of SPF, DKIM and DMARC for the underlying concepts.
Ask support to check actual messages from every system you use: your mailbox, newsletter platform, website forms and invoicing software. Request the results in writing.
For personal Gmail recipients, Google requires SPF or DKIM for all senders and SPF, DKIM and DMARC for bulk senders. These are Gmail requirements, not a universal checklist for every provider.
Check a Test Message
Send a test through the affected system to a Gmail account you control. In Gmail on a computer, open it, select the three-dot menu beside Reply and choose Show original, as described in Google’s header instructions.
Save the authentication results for support. Ask them to explain failures or missing results rather than copying DNS settings from an unrelated tutorial.
Passing authentication does not guarantee delivery, as Google explains.
4. Review Your Mailing List
For newsletters and promotional campaigns, check how each group of contacts joined.
Our recommended checks are:
- Keep records of signups and what subscribers agreed to receive.
- Exclude purchased or scraped addresses.
- Investigate invalid addresses and repeated delivery failures.
- Review old imports before sending another campaign.
- Check whether your messages match the subject and frequency promised at signup.
A WhatsApp enquiry or business-card exchange should not automatically become a newsletter subscription. Ask the person whether they want those emails.
Keep unsubscribed contacts excluded when moving between platforms. Mailchimp’s contact-status guidance distinguishes subscribed, unsubscribed, non-subscribed and undeliverable contacts. Preserve those distinctions in your own records.
5. Test the Unsubscribe Process
Send a marketing email to your own test subscriber address. Open the unsubscribe link and complete the process.
Then check:
- Can you find the link easily on a phone?
- Does the destination work?
- Is the address marked as unsubscribed?
- Is it excluded from the next marketing campaign?
- Will a later contact import preserve that choice?
A visible link and technical one-click unsubscribe are different features. Google requires qualifying bulk marketing messages to support both. Ask your platform whether it implements the required unsubscribe headers.
Keep this check focused on marketing subscriptions. Ask your provider how it separates promotional emails from necessary receipts and account messages.
6. Send Technical Support a Specific Request
Use your email provider for mailbox problems, your marketing platform for campaign problems and your website administrator for form-generated messages. If responsibility is unclear, ask them to identify the sending system first.
You can send this request:
Please check authentication and alignment for each affected sending system, delivery logs, rejection or deferral codes, sending limits and any reputation warnings.
Please also confirm whether the sending infrastructure has appropriate reverse DNS and encrypted transport, and whether our marketing platform supports the required unsubscribe functions.
Explain the cause supported by the evidence, the proposed fix, any additional charge and how we should retest.
Share message headers through the provider’s private support channel. Avoid posting customer correspondence publicly.
Ask for written findings and a clear handover. This gives you a record to review without requiring repeated troubleshooting calls.
7. Retest and Record the Outcome
After a change, repeat the same tests through each affected system.
Record the date, sending route, recipient provider, authentication results and arrival location. Include a reply test and, for marketing messages, an unsubscribe test.
A few successful tests are useful evidence, but they don’t prove every customer will receive every message in their inbox.
For quotations or booking details that need immediate attention, agree on an alternative with the customer. You might confirm through WhatsApp that the requested document was sent, without adding them to promotional broadcasts.
If missing messages form part of a wider enquiry problem, use our guide to checking a drop in website traffic or leads to investigate the surrounding contact journey.
Conclusion
Investigate business emails going to spam by checking the affected sending route, sender identity, authentication, subscriber records and unsubscribe process. Give technical support examples and request evidence of what changed.
For help reviewing your email-marketing practices and deciding what to prioritise, explore our marketing consultation service.
Frequently Asked Questions (FAQs)
Q: Why Does My Business Email Keep Going to Spam?
Business emails often go to spam because the sending domain isn’t properly authenticated, the sender has a poor reputation, recipients mark messages as spam, or the email is sent to outdated or unengaged addresses. Message content and sending patterns can also affect filtering. (Source)
Q: How to Stop Company Emails from Going to Spam?
Check that SPF and DKIM are correctly set up for every service sending email for your domain, and publish a DMARC record. Send only to people who expect your messages, remove invalid or inactive addresses, keep complaints low, and make unsubscribing easy for marketing emails. (Source)
Q: Why Are Important Emails Going to Spam?
Important emails can still be filtered because spam systems judge the sender’s authentication and reputation, recipient behaviour, and message characteristics; not just the importance of the message. Legitimate messages may also be caught by mistake. (Source)
Q: How Do I Stop an Email from Going to My Spam?
In your mail app, mark the message “Not spam” or move it to your inbox; this can help future messages from that sender. If it keeps happening, add the sender to your contacts or safe-senders list, and ask the sender to check their email authentication and sending reputation.
Related Article(s)
- Should a Small Business Opt Out of Google’s AI Search Features?
- Website Traffic or Leads Dropped: What Should a Nigerian Small Business Check First?
- Are Your Leads Being Counted? A Simple Conversion-Tracking Test for Nigerian Small Businesses
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