Is your email landing in the inbox or the spam folder?
10 free tools to check your authentication, catch spam triggers, and calculate what you need to send safely - then warm up your domain so emails actually arrive.
DNS & Authentication
Generate and validate the DNS records that prove your domain is legitimate.
SPF Record Generator
Build a valid SPF TXT record for any ESP. Select providers, add custom IPs, copy the ready-to-paste DNS record.
DMARC Policy Builder
Generate a DMARC record with the right policy level, reporting email, and enforcement settings.
DKIM Record Generator
Generate a real RSA DKIM key pair in your browser. Copy the DNS TXT record and private key.
Email Header Analyzer
Paste raw email headers to decode SPF, DKIM, and DMARC results and trace the delivery path.
Content & Sending
Check your email content and signature before it reaches the inbox.
Email Spam Checker
Check for spam trigger words, excessive CAPS, link count issues, and sender signals before you send.
Subject Line Tester
Score subject lines on length, spam risk, power words, and personalization - with specific improvement tips.
Email Signature Builder
Create a clean HTML email signature with live preview. Copy and paste directly into Gmail or Outlook.
Planning & Strategy
Calculate what you need before you start sending at scale.
Warmup ROI Calculator
Enter your inbox placement rate and campaign size to see exactly how much revenue spam is costing you.
Mailbox Calculator
Enter your target outreach volume and get the exact number of mailboxes and domains you need to send safely.
Deliverability Checklist
25-point pre-send checklist: authentication, warmup status, list hygiene, content, and tracking.
Tools fix one thing. MailPilot fixes everything.
Most senders check SPF once and forget it. MailPilot monitors inbox placement, authentication, and sender reputation continuously - and alerts you the moment something breaks. Free forever during early access.
Start warming up - it's free