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Ethereal is a fake SMTP service, mainly aimed at Nodemailer and EmailEngine users (but not limited to). It's an entirely free anti-transactional email service where messages never get delivered.

transactional and broadcast email API. 3,000 emails/month free, then as low as 8¢ per 1k

Free SMTP relay on the msgwing.com domain, up to 200 emails/day, no paid tier. Sends from a shared @msgwing.com address only (no custom domain). Ready-to-run code examples in 15 languages plus Windows Server/Linux/network printer setup guides. ⬆️ Back to Top

500 subscribers/month, 15,000 emails/month free

Free API for temporary email testing, free public email hosting, outbound capture, email-to-slack/websocket/webhook (1,500 monthly API limit)

6,000 emails/month free (200 emails daily sending limit)

Prevent users to sign up with temporary email addresses, 120 requests/hour (86,400 per month)

Email API with REST API and SMTP integrations, free for upto 3,000 emails/month.