Directory / QA & Testing
22 products in this lane of the email newsletter software directory. See also our Newsletter Info Blog and research guides.
Deliverability intelligence suite (formerly 250ok) for email performance monitoring.
HTML/CSS support reference for email clients.
Campaign Monitor guidance and tooling patterns for email design QA checklists.
Inbox placement and spam testing.
Gmail sender reputation, spam rate, and authentication monitoring.
HTML email validation tooling.
Creative QA and inbox rendering checks.
Email testing, analytics, and collaboration platform.
Spam score checker for email campaigns.
SMTP server + web UI for testing emails.
Local SMTP capture for development email testing.
Disposable inbox platform for capturing and testing emails in QA workflows.
Email and SMS testing for automated QA.
MailHog successor for local email testing.
Email sandbox for QA of transactional and marketing emails.
Smart Network Data Services for Outlook.com IP reputation and complaint data.
DNS, blacklist, and deliverability diagnostics.
Email development and collaboration tool.
Free tool to paste raw email source and get a spamassassin-style score.
Free tool to send HTML email tests to yourself.
Email client preview testing.
Enterprise deliverability platform for inbox placement and sender monitoring.