Free email deliverability tools

Reputation & placement

Email & IP Blacklist Checker

Check if your email, IP, or domain is on any blacklist. Scans 50+ databases and shows your health score instantly.

Authentication & DNS

SPF, DKIM & DMARC Checker

Verify your domain email authentication in one click. See which records pass, which fail, and how to fix them.

Reputation & placement

Email Verifier

Check if an email address is real before you send. Detects invalid mailboxes, catch-all domains, and SEG-protected addresses.

Reputation & placement

Inbox Placement Test

Test if your emails land in primary, promotions, or spam. Works across Gmail, Outlook, and Google Workspace.

Copy & content

Email Spam Checker

Paste your email copy and get a spam score. We scan for trigger words, formatting issues, and patterns that land you in spam.

Copy & content

Email Signature Generator

Create a professional HTML email signature in minutes. Works with Gmail, Outlook, and Apple Mail.

Planning & metrics

Email Warmup Calculator

Enter your target sending volume and get a day-by-day warmup schedule. Know exactly how many emails to send each day.

Copy & content

Subject Line Tester

Score your email subject line before you send. Get feedback on length, spam risk, and engagement potential.

Authentication & DNS

Email Header Analyzer

Paste raw email headers and see the full routing chain, authentication results, and delivery delays in a readable format.

Authentication & DNS

DNS Lookup Tool

Look up MX, A, CNAME, TXT, and NS records for any domain. See exactly how your domain is configured.

Authentication & DNS

Domain Age Checker

Check how old any domain is. See registration date, expiry date, and registrar info. Domain age matters for email deliverability.

Planning & metrics

Email Bounce Rate Calculator

Calculate your email bounce rate and compare it against industry benchmarks. See if your list health needs attention.

Planning & metrics

Email Open Rate Calculator

Calculate your email open rate and benchmark it against industry averages. See how your campaigns compare.

Planning & metrics

Cold Email Mailbox Calculator

Size your cold email infrastructure across Google Workspace, Microsoft 365, and Azure. Start from a monthly send volume, or work backwards from the meetings you want to book, and see the mailboxes, domains, and monthly cost it takes.