Email Deliverability Tools
Free tools to fix your SPF, DMARC, and inbox placement. No account required.
SPF Record Generator
Build a valid SPF TXT record for any email provider. Select your ESP, add custom IPs, and copy the ready-to-paste DNS record.
DMARC Policy Builder
Generate a DMARC record with the right policy level, reporting email, and enforcement settings for your domain.
Warmup ROI Calculator
Enter your current inbox placement rate and campaign size to see exactly how much revenue you're losing to spam — and how much warmup would recover.
Deliverability Checklist
The complete pre-send checklist for cold email senders: authentication, warmup status, list hygiene, content, and tracking — 25 items across 5 categories.
Email Spam Checker
Paste your email subject and body to check for spam trigger words, excessive CAPS, link count issues, and sender address signals before you send.
Subject Line Tester
Score your email subject lines on length, spam risk, power words, question format, and personalization — with specific feedback on how to improve each factor.
Email Header Analyzer
Paste raw email headers to decode SPF, DKIM, and DMARC authentication results, trace the delivery path, and identify the root cause of deliverability issues.