Is your domain killing your cold email campaigns?
Most cold email domains fail at least one deliverability check. Paste your domain — in 30 seconds you'll see if yours passes.
Check. Fix. Send.
Three steps to better inbox placement
Paste your domain
Enter your domain name. No signup, no credit card, no email required.
Get your report card
In 30 seconds, see your cold email health score and exactly what needs fixing.
Follow the fix guides
Step-by-step instructions for your specific domain provider. Most fixes take 2 minutes.
4 checks that determine your inbox placement
We test everything that matters for cold email deliverability
Sender permission
Controls who is allowed to send emails from your domain. Without it, anyone can impersonate you — and inbox providers notice.
Email signature
Adds a digital signature to every email you send. It proves the message wasn't tampered with in transit.
Spoofing protection
Tells inbox providers what to do when someone fakes your domain. Without it, spammers can send as you and damage your reputation.
Reputation check
We check 47 spam blacklists to see if your domain or IP has been flagged. Even one listing can tank your delivery rate.
Ready to protect your domains?
Daily monitoring, instant alerts, step-by-step fixes — from $19/mo.
See pricingFrequently asked questions
Why are my cold emails going to spam?
The most common reasons are missing email authentication (SPF, DKIM, and DMARC), being listed on a spam blacklist, or sending from a brand-new domain without warming it up. ColdScore checks all of these in 30 seconds and tells you exactly what to fix.
What is a cold email health score?
It’s a score from 0 to 100 that measures how likely your emails are to reach the inbox instead of spam. We check your domain’s sender permission, email signature, spoofing protection, and reputation across 47 blacklists to calculate it.
How do I fix my domain's email deliverability?
Run a free scan with ColdScore. We’ll show you exactly what’s wrong and give you step-by-step fix instructions specific to your domain provider (like Cloudflare, GoDaddy, or Namecheap). Most fixes take under 2 minutes.
Do I need SPF, DKIM, and DMARC for cold email?
Yes — all three. SPF controls who can send from your domain, DKIM proves your emails haven’t been tampered with, and DMARC tells inbox providers to reject fakes. Missing any one of them significantly increases your chance of landing in spam.
How long does it take to check my domain?
About 30 seconds. We run all four checks (sender permission, email signature, spoofing protection, and 47 blacklists) simultaneously. No signup or payment required.
Am I compliant with the Gmail/Yahoo Feb 2024 sender requirements?
Use our dedicated Gmail & Yahoo Bulk Sender Compliance Check. It verifies the four DNS-derivable requirements (SPF with -all/~all, DKIM ≥1024-bit, DMARC published, FCrDNS) and explains the four advanced ones (alignment, STARTTLS, one-click List-Unsubscribe, complaint rate) that need a sample email or Postmaster Tools data.