Email Delivery
Why Legitimate Business Email Ends Up in Spam
Quick Answer
Legitimate email usually lands in spam due to missing or misaligned SPF/DKIM/DMARC, a domain with limited sending history, or content patterns (like excessive links or spam-trigger words) that resemble bulk mail.
Spam filtering looks at a combination of authentication signals, sending history, and message content. No single factor guarantees inbox placement, but authentication problems are the most common fixable cause.
Common Causes
- SPF, DKIM or DMARC missing or not aligned with the sending domain.
- A newer domain with little sending history and no established reputation.
- Message content patterns that resemble bulk or promotional mail.
- Recipients marking similar past messages as spam.
Safe Troubleshooting Steps
- Confirm SPF, DKIM and DMARC are all correctly configured and aligned.
- Check whether the issue affects all recipients or specific mail providers only.
- Review message content for common spam triggers if authentication is already correct.
- Ask a recipient to check their spam folder and mark the message "not spam" if found.
What to Verify
- SPF, DKIM and DMARC all pass for outgoing mail.
- The issue is not isolated to a single recipient's personal filtering.
When Professional Help May Be Useful
If authentication is confirmed correct and spam placement continues, the cause may be sending reputation or content-related, which often benefits from a structured review rather than trial and error.