Why are my emails going to spam? The 5-minute authentication check
What's happening: The first thing Gmail, Outlook and Yahoo check is whether your domain proves the mail is really from you: SPF, DKIM and DMARC. Missing or broken records are the most common reason legitimate business mail lands in spam, ahead of content or wording.
How to fix it
- Run your domain through the free checker below: it reads SPF, DKIM, DMARC, BIMI, MX and the main blocklists.
- Fix anything marked failing, starting with SPF and DKIM, then DMARC.
- Check that every tool that sends as your domain (newsletter, CRM, invoicing, help desk) has its own DKIM set up for your domain.
- After authentication passes, look at the rest: sudden volume jumps, old or bought lists, and high complaint rates still hurt.
Not sure which record is wrong? Check your domain free: it shows which of SPF, DKIM and DMARC is failing, in 5 seconds, no signup.