All-in-one open-source mail and collaboration server with SMTP, IMAP, JMAP, CalDAV, CardDAV, and WebDAV, plus integrated anti-spam and phishing protection.
14.4k stars909 forkslast commit Actively maintained
14 self-hosted Yahoo Mail alternatives
Yahoo Mail is a web-based email service for sending, receiving, and organizing email. It offers spam filtering, search, folders, integrated contacts and calendar, mobile apps, and access via standard IMAP/SMTP/POP protocols.
Alternatives to Yahoo Mail
Mailcow is a dockerized mail server suite providing SMTP/IMAP, webmail, anti-spam/anti-virus, and domain/mailbox administration via a unified web UI.
13.3k stars1.8k forksGPL-3.0last commit Actively maintained
#3
Mailu is a full-featured mail server distributed as Docker images, providing SMTP/IMAP/POP3, webmail, administration UI, and built-in security and anti-spam features.
7.5k stars997 forkslast commit Actively maintained
Open source webmail client for IMAP with address book, search, folders, and a customizable UI via plugins and skins.
7.1k stars1.8k forksGPL-3.0last commit Actively maintained
#5
Modoboa is an open source mail server management platform with a modern web UI, integrating Postfix and Dovecot with admin tools, webmail, calendar, and address book.
3.5k stars481 forksISClast commit Actively maintained
#6
Open source groupware suite providing webmail, calendaring, address books, and shared resources via open standards like IMAP, CalDAV, and CardDAV.
2.2k stars320 forksGPL-2.0last commit Actively maintained
#7
Automated open-source mail server installer bundling Postfix, Dovecot, webmail, anti-spam/antivirus and LDAP/SQL backends for mainstream Linux/BSD.
1.8k stars260 forksGPL-3.0last commit Actively maintained
SnappyMail is a fast, modern webmail client (RainLoop fork) focused on performance, privacy, and secure IMAP access with optional PGP support and admin controls.
1.7k stars215 forksAGPL-3.0last commit Actively maintained
Nextcloud Mail is a webmail app that connects to IMAP/SMTP accounts, offering a unified inbox and deep integration with other Nextcloud apps like Contacts and Calendar.
1k stars340 forksAGPL-3.0last commit Actively maintained
#10
Cyrus IMAP is a secure, scalable mail server providing IMAP/JMAP email plus CalDAV/CardDAV contacts and calendars, with ACLs, quotas, search, and replication.
643 stars175 forkslast commit Actively maintained
#11
Open-source PHP groupware providing CalDAV/CardDAV, ActiveSync, email client, CRM, tasks, file manager and Docker images for on-premise collaboration.
21 stars4 forksAGPL-3.0last commit Actively maintained
#12
Lightweight PHP webmail client for IMAP/SMTP servers, offering a simple interface, plugin extensibility, and broad compatibility with standard mail backends.
Activity unknown
#13
Citadel is an open source groupware and messaging server providing email, calendars, contacts, and a web interface with room-based collaboration.
Activity unknown
#14
Open-source webmail and groupware offering email, contacts, calendar, cloud drive, tasks, notes and an admin control panel for multi-tenant email services.
Activity unknown
What replacing Yahoo Mail actually involves
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 11 of 14 shipped a commit in the last six months. Licences in this list: GPL-3.0, ISC, GPL-2.0, AGPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Webmail Clients.
