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Email Deliverability Tester - MarTech Blog

Email Deliverability Tester2026

Score your email setup across authentication, infrastructure, content, and reputation. Get actionable fixes to land in the inbox, not spam.
Sender Information
Sending Domain e.g. yourbrand.com
Email Platform
Monthly Send Volume
List Size (subscribers)
Authentication Setup Check your DNS records and confirm what you have configured.
SPF Record
DKIM Signing
DMARC Policy
Custom Return-Path / CNAME
List Hygiene & Engagement
Average Open Rate
Bounce Rate
Spam Complaint Rate
List Cleaning Frequency
Sunset Inactive Subscribers?
Double Opt-In?
Content & Infrastructure
Dedicated IP or Shared?
Unsubscribe Link Visible?
Image-to-Text Ratio
Using Spam Trigger Words? "Free", "Act now", "Limited time" in subject lines
List-Unsubscribe Header?
Warm-Up Done for New IP/Domain?
Test Deliverability →
Overall Deliverability Score
0out of 100
Score by Category
Detailed Analysis
↺ Test Again
Copy Report
✓ Copied to clipboard!
2026 Deliverability Essentials Google & Yahoo require DMARC, SPF, and DKIM for bulk senders (5,000+ emails/day) One-click unsubscribe (List-Unsubscribe header) is now mandatory for Gmail Keep spam complaints under 0.1% — Google's threshold for blocking Warm up new domains/IPs over 4-6 weeks before full volume Sunset subscribers who haven't opened in 90 days — they're killing your reputation Authenticated custom domains get 10-20% higher inbox placement vs shared Send from a subdomain (mail.yourbrand.com) to isolate reputation from main domain
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