Free, open-source, downloadable replacements for SendGrid
Self-hosted mail delivery platform for websites — 📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail
↔ alternative to SendGrid、Mailgun
Open-source self-hosted email platform — The Open-Source Email Platform
↔ alternative to SendGrid
Transactional email server with a web UI — Transactional email server with a lovely web interface
↔ alternative to SendGrid、Mailgun、Postmark
