Resources / Free Tools
Free Tools
Explore our collection of free tools built for outbound and transactional email engineers.
Core Infrastructure Tools
SPF Record Checker
Validate your Sender Policy Framework records to prevent email spoofing and ensure optimal delivery.
DKIM Record Checker
Ensure your DomainKeys Identified Mail signatures are correctly configured and valid.
DMARC Record Checker
Analyze your DMARC policy to protect your domain reputation and enforce authentication.
Email Blacklist Checker
Check if your sending IP or domain is listed on major spam blocklists affecting deliverability.
Email Header Analyzer
Inspect raw email headers to debug routing, delays, and hidden authentication issues.
Domain Generator
Generate available domain variations for building scalable cold email outreach infrastructure.
Email Signature Generator
Create clean, professional, and responsive HTML email signatures that render perfectly.
Spam Word Checker
Scan your email copy for spam trigger words and deliverability risks before hitting send.