How to check your email deliverability score. Tools and methods explained

newbienick · 2026-03-06 · 720 views

Saw someone mention deliverability score and realized I have no idea how to check mine. After researching, here are the tools and methods I found for monitoring email deliverability.

Free tools:

• Google Postmaster Tools: Shows your domain reputation, spam rate, and authentication results for emails sent to Gmail. Essential and free. Set it up immediately.
• MXToolbox: Checks your SPF, DKIM, DMARC records and whether your domain/IP is on any blacklists.
• Mail-tester.com: Send a test email and get a spam score out of 10. Quick sanity check before launching campaigns.

Paid tools:

• GlockApps: The gold standard for inbox placement testing. Shows exactly where your emails land (inbox, spam, promotions) across Gmail, Outlook, Yahoo. Costs about $60/month but worth it if you send at volume.
• PuzzleInbox Spam Checker: Free if you are a PuzzleInbox customer. Tests inbox placement and DNS authentication in one click.

Key metrics to monitor weekly:

1. Inbox placement rate (target: 85%+)
2. Spam rate in Google Postmaster (target: under 0.3%)
3. Bounce rate (target: under 2%)
4. Domain reputation in Postmaster (target: Medium or High)

Set up a weekly monitoring routine. Deliverability can degrade gradually and by the time you notice performance dropping, the damage is already done. Catching issues early saves domains.

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