flectar / mail

Built from the ground up for speed. Flectar Mail delivers native performance, instant startup, and as little as 80 MB of RAM.

UCS-Care-Group / mailcraft

MailCraft: an open-source, clean-room mail, calendar and contacts program in pure Rust, for Microsoft 365, Outlook.com and IMAP. Early alpha.

c9dev / penguin-mail

Mail and calendar for Linux and macOS. Gmail and IMAP accounts, Google Calendar, contacts, OpenPGP and S/MIME. GTK4 and libadwaita, written in Rust.

rustmailer / rustmailer

A self-hosted Email Middleware for IMAP, SMTP, Gmail API, Graph API — built for developers