SendCheckIt
Email deliverability and marketing tools to test, validate, and optimize email campaigns.
SendCheckIt is a suite of email testing and deliverability tools built and operated by Expedited SSL LLC. It addresses the problem that email problems often go unnoticed: messages can land in spam or fail authentication without a bounce or error. The platform began as a free subject line tester that compares a subject line against a large set of real marketing emails, and it now covers the broader deliverability picture.
The toolkit includes a Subject Line Tester and Subject Line Tester API, an Email Deliverability Check for SPF, DKIM, and DMARC DNS records, an Email Blocklist Checker, and dedicated SPF, DKIM, and DMARC checkers. It also offers DMARC report parsing that converts XML reports into a readable list of senders, DNS change monitoring with email alerts, a Compliance Checker covering CAN-SPAM and GDPR, a Cadence Colorizer for visualizing sending patterns, and a Compliance Checker. Additional capabilities include MTA-STS hosting, hosted SPF, forensic report (RUF) access, lookalike domain detection, and API access on higher tiers.
SendCheckIt is aimed at senders who need to monitor authentication, blocklists, and inbox placement across their domains. It is packaged with a free plan covering one domain with limited data retention, plus paid editions that scale the number of domains and history retained, with a 7-day free trial available on paid plans.
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