Will your email reach the inbox?
Send your campaign to a disposable address. Get a /10 deliverability score with SpamAssassin, authentication and blacklist diagnostics in seconds.
What you get
Live report preview
Every signal Gmail weighs — in one readable report.
newsletter@yourbrand.com — received 12s ago
Simple as 1-2-3
How does it work?
No signup needed. 30 seconds between you and your first score.
- Copy the address
Copy the generated email address.
- Send your email
Send your newsletter/campaign to it from your real sender (ESP, CRM, app…).
- Read your report
Get your /10 score and fix what's blocking your deliverability.
Deep diagnostics
Everything that decides inbox placement
The same signals Gmail, Outlook and Yahoo use to filter you.
SpamAssassin
The industry-standard spam filter scores your content and lists every triggered rule.
SPF · DKIM · DMARC
Full authentication audit: SPF result, DKIM signature validity, DMARC policy and alignment.
28+ DNS blacklists
Your sending IP checked against Spamhaus, Barracuda, SpamCop, UCEPROTECT and 24 more.
Link & content audit
Broken links, missing image alt attributes, text/HTML ratio, message weight.
MIME structure
Plain-text alternative, List-Unsubscribe header, unsubscribe link in the body.
Actionable score
A /10 score with every point lost explained — fix what actually matters.
SpamAssassin
Every rule, explained
SpamAssassin runs hundreds of rules on your content — we show you exactly which ones fired and how much they cost you.
- Full per-rule breakdown with points
- Same engine used by hosting providers
- Updated rules via sa-update daily
Free tools
More free tools
Domain scanner
Audit SPF, DKIM, DMARC, BIMI, MX and blacklists of any domain.
Scan →Blacklist checker
Check any IP or domain against 25 DNS blacklists.
Check →Header analyzer
Paste email headers to trace hops and authentication results.
Analyze →SPF generator / DMARC generator
SPF · DMARC · DNS
Generate →FAQ
How do I test my email deliverability?
Send your email to the generated address, then open your report to get a score out of 10 with detailed SpamAssassin, SPF, DKIM, DMARC and blacklist checks.
Is it free?
Yes — 3 free tests per day, no account needed. Unlimited tests, history and API with a Pro subscription.
What exactly is checked?
SpamAssassin content score, SPF/DKIM/DMARC authentication, reverse DNS, ~25 DNS blacklists, HTML quality, broken links and the List-Unsubscribe header.
Why do I need a special address?
Deliverability depends on your real sending infrastructure — IP reputation, signatures, headers. Sending through your actual ESP/CRM reproduces exactly what inbox providers see.
Ready to know your real score?
Then check your score →deliverability · measured