Free tools
Fix issues
before they
cost you opens.
DNS configuration checks, blacklist monitoring, and deliverability diagnostics — free for all logged-in users.
01
Domain & IP Monitor
Check SPF, DMARC, DKIM, PTR, and FCrDNS configuration. Scan against 10+ IP blacklists and 4 domain blacklists. Up to 20 items, re-checkable on demand.
Open tool02
HTML Email Linter
Paste your email HTML and get instant feedback on unsupported CSS, missing attributes, broken table markup, and other common issues.
Open tool03
More tools coming
More free tools on the way — covering email design, code quality, and deliverability. Check back soon.