October 15, 20266 min read
How to Check If Your Emails Go to Spam (5 Free Methods)
Worried your cold emails land in spam? Five free ways to check — from seed inboxes to Gmail's own tools — plus what to fix when they do.
What is an email spam check? An email spam check tests whether your messages land in the inbox or the spam folder. The most reliable method is sending your actual email to seed inboxes you control and checking where each copy lands.
Method 1 — Seed inbox test. Create or designate Gmail, Outlook and Yahoo accounts as seeds. Send your exact campaign email to them, wait 5 minutes, then check inbox vs spam in each. This mirrors what real recipients experience.
Method 2 — Mail-tester.com. Send your email to the address it generates and get a 0–10 spam score with specific fixes (authentication, content, blacklists). Free for a few tests per day.
Method 3 — Gmail 'Show original'. Open a received test email in Gmail, click the three dots, then 'Show original'. Check SPF, DKIM and DMARC all say PASS — any failure is a spam-folder fast track.
Method 4 — Google Postmaster Tools. Free for domain owners; shows your domain's spam complaint rate and reputation as Google sees it. A complaint rate above 0.3% needs immediate attention.
Method 5 — Placement testing inside your sending tool. The best cold email platforms run seed tests natively: pick a campaign, send to seeds, and get per-inbox inbox/spam results with history.
If tests show spam placement, fix in this order: authentication (SPF/DKIM/DMARC), then list quality (remove bounces), then content (links, spam words, image-to-text ratio), then volume (slow down new domains).
Vexrim Outreach bakes placement testing into the Deliverability page — run a test before every campaign and watch your inbox rate trend up over time.