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jstedfast/MailKit
A cross-platform .NET library for IMAP, POP3, and SMTP.
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- mailpile/Mailpile
A free & open modern, fast email client with user-friendly encryption and privacy features
Why this match
topics imap-client, pgp, smtp-client; language differs: C# → Python
- Mailu/Mailu
Insular email distribution - mail server as Docker images
Why this match
topics dkim, email, imap; language differs: C# → Python
- ZIDAN44/mailcraft
An open-source, clean-room, local-first alternative to Microsoft Outlook in pure Rust
Why this match
topics email, imap, pop3; language differs: C# → Rust; license differs: MIT → Apache-2.0
- leeguooooo/mail-use
Email for AI agents — read, search, send and triage Gmail / QQ / 163 / any IMAP from the CLI or MCP. Part of the *-use family.
Why this match
topics email, imap, smtp; language differs: C# → JavaScript
- pimalaya/himalaya
CLI to manage emails
Why this match
topics email, imap, pgp; language differs: C# → Rust; license differs: MIT → Apache-2.0
- stalwartlabs/stalwart
All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).
Why this match
topics imap, pop3, smtp; language differs: C# → Rust
- mail-in-a-box/mailinabox
Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.
Why this match
topics email, smtp; language differs: C# → Python; license differs: MIT → CC0-1.0
- docker-mailserver/docker-mailserver
Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.
Why this match
topics imap, pop3, smtp; language differs: C# → Shell