The Best Free Email Tester for Cold Outreach
Score your sales email across 10 categories - deliverability, subject line, spam risk, and more. Free. No signup.
Results in under 60 seconds · Up to 3 emails/day free
How the Email Tester Works
Paste your sales email
Paste the subject line and body of any cold email, follow-up, or outreach you want analyzed
AI analyzes everything
We check deliverability, content quality, spam risk, and persuasion across 10 categories
Get your score report
Detailed score out of 100, category breakdown, and your top 3 quick wins to improve
Why Your Email Score Matters
Most outreach fails silently. Your emails land in spam, get ignored, or never arrive - and you'll never know unless you test.
Email Deliverability Problems Are Invisible
Misconfigured SPF, DKIM, or DMARC means your emails land in spam - and there's no bounce, no error, no notification. They just vanish. Our email deliverability tester catches these before your prospects' inboxes do.
Your Subject Line Decides Everything
47% of recipients decide whether to open based on the subject line alone. A weak subject line wastes every word that follows - and you'll never know it's the reason nobody replies.
Generic Cold Emails Get Deleted
Emails without personalization get 3x fewer replies. If your prospect can tell it's a template, they'll delete it without reading past the first line.
A Vague CTA Means Zero Replies
Every email needs a single, clear next step. Vague asks like 'let me know your thoughts' get ignored. Specific CTAs get responses.
Spam Filters Work Against You Silently
Words like 'guaranteed' or 'act now' send your email straight to spam. You'll never see it happen - your prospect just never responds, and you'll never know why. Our spam tester catches these triggers before you hit send.
A Higher Email Score = More Replies
A 10-point improvement on your email score can mean 2–3x more replies over a campaign. Testing before sending is the highest-leverage thing you can do.
10 Categories We Score
Each category is scored 0–10, for a total out of 100. Here's exactly what our email tester checks.
Deliverability
SPF, DKIM, DMARC, and MX record checks on your sending domain
Subject Line
Length, curiosity, relevance, and open rate potential
Opening Hook
First sentence impact - does it earn the next line?
Personalization
Relevance signals that show this isn't a mass blast
Value Proposition
Clarity of what's in it for the recipient
Call to Action
Single, specific next step that's easy to say yes to
Length & Format
Readability, scannability, and appropriate length
Tone & Voice
Professional yet human - not robotic, not too casual
Spam Risk
Trigger words, patterns, and formatting that trip filters
Standout Factor
What makes this email memorable vs. the 100 others they got today
Related Tools & Resources
Improve every part of your outreach - from writing better emails to building your entire sales pipeline.
Cold Email Tool
Send AI-personalized cold emails at scale with managed deliverability.
AI SDR
Automate prospecting and outreach with an AI sales development rep.
AI Sales Tool
End-to-end AI-powered sales automation for your team.
Cold Outbound
Run cold outbound campaigns with unique, personalized emails for every prospect.
Pricing
See plans and pricing for Skyp's email outreach platform.
Other email testing tools
A quick guide to what else is out there and when each tool is useful.
Tests spam score across 3 major filters (Google, Barracuda, SpamAssassin) and monitors inbox placement across 115+ inboxes.
Best for: Teams that send volume and need to monitor placement across mailbox providers.
Free spam score checker that runs your email through SpamAssassin and checks basic DNS setup.
Best for: Quick one-off checks. Simple and free, limited depth.
Checks your domain against 100+ blacklists, validates SPF, DKIM, and DMARC records, and monitors inbox health.
Best for: Technical DNS diagnostics and blacklist monitoring.
Tests emails against spam filters, validates headers, and checks blacklist status with improvement guidance.
Best for: Developers building email workflows who need staging environment testing.
Previews your email across 25+ email clients and devices, plus spam filter checks and deliverability insights.
Best for: Design-heavy emails where cross-client rendering matters.
Pre-send spam checks across 20+ filters, blocklist monitoring, accessibility checks, and link validation.
Best for: Marketing teams with compliance requirements and high-volume sends.
Free tool that runs your email through the actual SpamAssassin ruleset and returns a detailed score.
Best for: Developers who want a fast, free SpamAssassin score via API.
None of these test actual deliverability from your sending domain.
They score your email content and DNS setup, but they cannot tell you whether your emails are actually reaching inboxes. That requires sending from your real infrastructure and monitoring real inbox placement. Skyp monitors this for every campaign, automatically.
Frequently Asked Questions
Everything you need to know about the free email tester.