Open Source #email Projects

Open source CRM with unlimited users, built by the Frappe team for lead, deal and sales pipeline management.

Privacy-first password manager with built-in email aliasing. Fully encrypted and self-hostable.

Open source disposable email testing server with built-in SMTP, POP3, REST, and web interfaces — no database required.

Open source notification infrastructure you self-host — one API for email, SMS, push, and webhooks with fallbacks, quiet hours, retries, and logs.

Open-source help desk ticketing system. Routes emails, web forms, and phone requests into a unified agent workspace. Self-hosted, PHP, GPL-2.0.

Self-hosted web app for archiving, searching, and exporting email from multiple IMAP accounts with migration support.

Self-hostable open source email archiving platform for compliance, retention, legal hold, and full-text search.