Troubleshoot and resolve emails landing in spam or being quarantined.
If your emails are landing in spam or being quarantined, work through this checklist to identify and fix the issue.
Make sure your domain has all three authentication records properly configured:
If any of these records are missing or misconfigured, fix them first. Authentication issues are the most common cause of spam placement.
When an email lands in spam, providers like Gmail display a banner explaining why. Here are common messages and what they mean:
| Banner message | What it means | Fix |
|---|---|---|
| "It's similar to messages that were identified as spam in the past." | Content is triggering spam filters | Simplify your email content and remove excessive links, images, or marketing language |
| "This message seems dangerous" | A URL or content was flagged as malicious | Review the links and content in your email for anything that might be flagged as unsafe |
Some recipients use enterprise email security services like Mimecast, Proofpoint, or Barracuda. These services apply their own filtering on top of standard spam checks.
If your emails are being blocked by a specific corporate recipient:
notifications@ for transactional emails and updates@ for marketing emails. For more guidance on domain setup, review Is it better to send emails from a subdomain or the root domain?.For provider-specific guidance, see How do I avoid Gmail's spam folder?. For Outlook, message headers include Spam Confidence Level (SCL) and Bulk Complaint Level (BCL) scores. See How do I avoid Outlook's spam folder? to read them.
no-reply sender addresses