Open source alternatives to Fastmail

1 free, self-hostable tool you can use instead of Fastmail.

Alternatives to Fastmail 1

Mailflare

Replaces Fastmail

Host custom-domain email on your own Cloudflare account with Mailflare, a self-hosted inbox with full send/receive, smart rules, and zero mystery servers.

★ 5,100 AGPL-3.0 CRM & Project Management