Self-hosted projects tagged “IMAP

31 open source projects with this tag

31 services found

UVdesk

UVdesk

Open-source PHP helpdesk and ticketing system for multichannel support

18k
557
Last commit: 4mo ago

UVdesk is an open-source PHP/Symfony helpdesk for ticketing, email/mailbox integration, workflows, knowledge base and eCommerce connectors.

Alternative to:
Zendesk
Zendesk
+19
docker-mailserver

docker-mailserver

Containerized mail server stack for SMTP and IMAP with anti-spam

18k
2k
Last commit: 8d ago

Production-ready mail server stack in a Docker container with SMTP, IMAP/POP3, LDAP auth, anti-spam/AV, DKIM/DMARC, and optional OAuth2 support.

Alternative to:
Gmail
Gmail
+16
Mail-in-a-Box

Mail-in-a-Box

Turnkey email server with webmail, DNS, TLS, and admin panel

15.2k
1.5k
Last commit: 24d ago

Mail-in-a-Box is a one-click mail server appliance for Ubuntu, bundling SMTP/IMAP, webmail, DNS, TLS automation, backups, and an admin control panel.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+15
mailcow: dockerized

mailcow: dockerized

Docker-based email server suite with a web admin interface

12.2k
1.6k
Last commit: 27d ago

Mailcow is a dockerized mail server suite providing SMTP/IMAP, webmail, anti-spam/anti-virus, and domain/mailbox administration via a unified web UI.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+16
Stalwart Mail Server

Stalwart Mail Server

All-in-one mail and collaboration server for modern and legacy protocols

11.7k
650
Last commit: 10h ago

All-in-one open-source mail and collaboration server with SMTP, IMAP, JMAP, CalDAV, CardDAV, and WebDAV, plus integrated anti-spam and phishing protection.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+19
Mailu

Mailu

Docker-based mail server with webmail and admin interface

7.1k
966
Last commit: 25d ago

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.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+19
Roundcube

Roundcube

Browser-based IMAP webmail client with extensible plugins and skins

6.8k
1.7k
Last commit: 3d ago

Open source webmail client for IMAP with address book, search, folders, and a customizable UI via plugins and skins.

Alternative to:
Zimbra Collaboration
Zimbra Collaboration
+11
Maddy Mail Server

Maddy Mail Server

Composable all-in-one SMTP/IMAP mail server with security features

5.9k
309
Last commit: 1mo ago

Go-based, modular mail server implementing SMTP/LMTP/IMAP with built-in DKIM/SPF/DMARC, storage backends (SQLite/Postgres/S3), Prometheus metrics and Docker support.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+10
Mox

Mox

Modern, secure, all-in-one mail server for self-hosted email

5.5k
181
Last commit: 2mo ago

All-in-one secure mail server with SMTP, IMAP, webmail, automatic TLS (ACME), and built-in SPF/DKIM/DMARC plus junk filtering for low-maintenance domains.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+19
Modoboa

Modoboa

Mail hosting and management platform with web UI and webmail

3.5k
455
Last commit: 13h ago

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.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+16
Peppermint

Peppermint

Self-hosted help desk and issue tracking system

3k
352
Last commit: 5mo ago

Peppermint is a self-hosted help desk and issue tracker with email-to-ticket, notes, file uploads, webhooks, and OIDC authentication for teams.

Alternative to:
Zendesk
Zendesk
+18
emailwiz

emailwiz

Bash-based installer that deploys a secure Debian/Ubuntu mail server stack.

2.1k
336
Last commit: 9mo ago

A Bash script that auto-implements a full mail server (Postfix, Dovecot, DKIM, SpamAssassin) with TLS and PAM-based logins on Debian/Ubuntu.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+14
SOGo

SOGo

Scalable groupware server with webmail, calendars, and contacts

2.1k
304
Last commit: 9h ago

Open source groupware suite providing webmail, calendaring, address books, and shared resources via open standards like IMAP, CalDAV, and CardDAV.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+19
WildDuck

WildDuck

Scalable IMAP/POP3 mail server with MongoDB backend and REST API

2.1k
276
Last commit: 14h ago

WildDuck is a horizontally scalable IMAP/POP3 mail server that stores all mail in MongoDB, runs stateless Node.js workers, and provides a REST API for full server control...

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+13
iRedMail

iRedMail

Open-source full-featured mail server stack for Linux/BSD

1.8k
251
Last commit: 9h ago

Automated open-source mail server installer bundling Postfix, Dovecot, webmail, anti-spam/antivirus and LDAP/SQL backends for mainstream Linux/BSD.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+16
Open Archiver

Open Archiver

Open-source platform for legally compliant email archiving

1.7k
79
Last commit: 1d ago

Self-hosted email archiving platform for ingesting, storing, indexing and searching emails from Gmail, Microsoft 365, IMAP, PST and more.

Alternative to:
MailStore Server
MailStore Server
+4
Mail-Archiver

Mail-Archiver

Web app to archive, search, and export email from multiple accounts

1.6k
53
Last commit: 1d ago

Self-hosted email archiving system for syncing IMAP and Microsoft 365 mailboxes, indexing content and attachments, and exporting or restoring mailboxes with auditing and...

Alternative to:
MailStore Server
MailStore Server
+3
SnappyMail

SnappyMail

Lightweight web-based email client for IMAP accounts

1.5k
183
Last commit: 8mo ago

SnappyMail is a fast, modern webmail client (RainLoop fork) focused on performance, privacy, and secure IMAP access with optional PGP support and admin controls.

Alternative to:
Gmail
Gmail
+10
Bichon

Bichon

Rust-based email archiver with IMAP sync, full-text search, and Web UI

1.4k
38
Last commit: 15d ago

Self-hosted email archiving server that syncs from IMAP, stores a local compressed archive, and provides fast full-text search via Web UI and REST API.

Alternative to:
MailStore Server
MailStore Server
+3
Dovecot

Dovecot

Secure IMAP, POP3 and LMTP server and email storage backend

1.2k
327
Last commit: 1d ago

High-performance, standards-compliant IMAP/POP3/LMTP server with flexible authentication, extensible plugin system (Lua, Sieve) and OpenSSL TLS support.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+15
Nextcloud Mail

Nextcloud Mail

Webmail client app for Nextcloud (IMAP/SMTP)

953
300
Last commit: 16h ago

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.

Alternative to:
Microsoft Outlook
Microsoft Outlook
+11
DavMail

DavMail

Exchange and Microsoft 365 gateway for standard mail and PIM protocols

704
102
Last commit: 3d ago

DavMail is a Java gateway that lets standard clients use IMAP/POP/SMTP, CalDAV, CardDAV, and LDAP with Microsoft Exchange and Microsoft 365 via OWA/EWS.

Alternative to:
Proton Mail Bridge
Proton Mail Bridge
Davis

Davis

CalDAV/CardDAV/WebDAV server with a Symfony-based admin interface

672
39
Last commit: 14d ago

Davis is a sabre/dav-based CalDAV/CardDAV/WebDAV server with a modern Symfony 7 admin dashboard for managing users, calendars, sharing, and address books.

Alternative to:
Google Calendar
Google Calendar
+6
Cyrus IMAP

Cyrus IMAP

Email, contacts, and calendar server with IMAP and JMAP

620
161
Last commit: 10h ago

Cyrus IMAP is a secure, scalable mail server providing IMAP/JMAP email plus CalDAV/CardDAV contacts and calendars, with ACLs, quotas, search, and replication.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+18
Piler

Piler

Open-source email archiving and eDiscovery platform

262
40
Last commit: 5d ago

Scalable email archiving solution with tamper-evident retention, full-text search, legal hold, deduplication and access controls for compliance.

Alternative to:
MailStore Server
MailStore Server
+1
Group-Office

Group-Office

Enterprise groupware and CRM with calendars, files and email

253
52
Last commit: 1d ago

PHP-based groupware and CRM for teams: calendars, contacts, email, file management, projects and CRM with CalDAV/CardDAV/IMAP support and extensible modules.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+15
LetterFeed

LetterFeed

Convert email newsletters into RSS feeds via IMAP

177
9
Last commit: 4mo ago

Self-hosted app that scans an IMAP mailbox and exposes each configured sender's newsletters as RSS feeds. Deployable via Docker Compose with a web UI.

Alternative to:
Kill the Newsletter!
Kill the Newsletter!
+3
Simple NixOS Mailserver

Simple NixOS Mailserver

NixOS module for running a complete email server stack

Simple NixOS Mailserver provides NixOS modules to deploy a full email server with SMTP/IMAP, spam filtering, DKIM/DMARC/SPF, and TLS automation.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+14
Courier Mail Server (Courier MTA)

Courier Mail Server (Courier MTA)

Integrated mail server suite with SMTP, IMAP, POP3 and webmail

Courier is an integrated mail server suite providing ESMTP (MTA), IMAP, POP3, webmail, and mailing lists with optional LDAP/MySQL/PostgreSQL-backed virtual accounts.

Alternative to:
Microsoft Exchange Online
Microsoft Exchange Online
+14
SquirrelMail

SquirrelMail

Browser-based IMAP webmail client written in PHP

Lightweight PHP webmail client for IMAP/SMTP servers, offering a simple interface, plugin extensibility, and broad compatibility with standard mail backends.

Alternative to:
Gmail
Gmail
+10