preview-email
Automatically opens your browser and iOS Simulator to preview Node.js email messages sent with Nodemailer. Made for Forward Email and Lad. Cross-browser and cross-platform email testing.
mailslurp-client
Official client for MailSlurp Email and SMS API. Create email addresses and phone numbers in Javascript without a mail server. Send and receive real emails in applications or tests.
verifalia
Verifalia email verification library for JavaScript: verify email addresses in real-time and check whether they are deliverable, invalid, or otherwise risky.