Business Email Going to Spam? SPF, DKIM and Sending Reputation Checks

Business email going to spam can involve domain authentication, sending reputation, message content or recipient policies. SPF and DKIM matter, but adding records without knowing all sending services can make delivery worse. Start with an actual message and its headers.

Business email going to spam: identify the affected messages

Check whether all recipients report spam placement or only one provider or mailbox. Compare a normal customer email with a transactional website notification. Record the send time, sender domain and platform. One personal test does not prove a global reputation problem.

Review SPF authorisation

Look up the SPF TXT record and list systems authorised to send as the domain. Multiple separate SPF records at the same name can cause evaluation trouble. Remove retired services only after verifying they no longer send legitimate mail. SPF validates the envelope domain and may not align with the visible From address by itself.

Check DKIM and DMARC

Confirm that each sending service signs with the intended DKIM domain. DMARC evaluates alignment and applies a published policy; it is not a magic delivery switch. Review authentication results in actual headers and provider settings. Avoid a strict reject policy before legitimate sending streams are accounted for.

Business email going to spam despite correct DNS

Shared IP reputation, compromised accounts, sudden volume and recipient engagement can influence filtering. Check for unexpected sending activity and security alerts. Keep list hygiene and consent records in order. Do not buy addresses or send large repeated test batches to diagnose the issue.

Retest business email going to spam by sending source

Send controlled messages through each legitimate platform and inspect headers at several recipient services. Document changes and observe consistent results. If business email is going to spam from only one service, investigate that sending route first. Avoid rewriting the entire domain policy for a problem confined to one platform. Include the website’s form notifications in the test.

Related: business email support and Microsoft 365 authentication guide.

Compare the recipient provider’s requirements

Check the current rules for the services receiving your mail. Google’s email sender guidelines distinguish requirements for all senders from additional requirements for bulk senders. Authentication alone does not guarantee inbox delivery. Review the applicable sending volume, authentication, alignment, complaint and unsubscribe requirements before changing a campaign or domain policy.

Keep a small evidence log for each test: sending service, recipient provider, authentication result and final folder. This helps distinguish a repaired sending route from a one-off successful message.