Courier
The Courier mail transfer agent (MTA) serves as an integrated mail and groupware server, supporting ESMTP, IMAP, POP3, and more through a unified framework. It offers flexible component management, web-based calendaring, and can operate on various POSIX systems. With robust mailing list management and spam filtering capabilities, Courier ensures secure and efficient email handling.
Top Courier Alternatives
Mercury Mail Transport System
The Mercury Mail Transport System functions as an efficient mail server, managing incoming and outgoing emails for users within a local area network.
Dovecot Pro
Dovecot Pro stands out as a premier email backend, chosen by leading Telcos, ISPs, and Hosters.
Horde
The latest release of Horde Groupware enhances usability with a fresh design and improved mobile support, allowing seamless access to emails, calendars, and tasks from any device.
mailcow
mailcow is a user-friendly, open-source groupware and email suite built on Docker, leveraging established components for a seamless email server experience.
Exim
Exim is a versatile mail transfer agent (MTA) designed for Unix-like systems, offering robust mail routing and extensive incoming mail verification features.
iRedMail
Deploying a full-featured, open-source mail server takes mere minutes with this solution, which integrates essential components and best practices.
Dovecot
It optimizes hardware utilization and offers robust support, making it ideal for leading Telcos, ISPs...
Mailu
It supports standard protocols like IMAP and SMTP, alongside advanced functionalities such as custom routing...
Citadel
Its unique room-based architecture offers intuitive organization, making it user-friendly and adaptable...
Oracle Communications Messaging Server
It supports multiple email protocols and efficiently manages various file types, including embedded text, sound...
Cyrus IMAP
It supports CardDAV and CalDAV, along with extensive authentication options through Cyrus SASL...
Scalix
Its Linux-based platform minimizes licensing expenses while maximizing efficiency with lower server requirements...
Zentyal
It provides essential services like SMTP and POP3/IMAP mail servers, ensuring reliable Internet access...
hMailServer
It efficiently supports essential email protocols such as IMAP, SMTP, and POP3, ensuring seamless integration...
Top Courier Features
- Integrated mail/groupware server
- Supports multiple protocols
- Web-based administration interface
- Enables/disables components easily
- Native Maildir storage format
- Basic web-based calendaring
- Advanced groupware calendaring forthcoming
- Compiles on POSIX systems
- Supports LDAP databases
- Spam filtering implementation
- Automatic domain blacklisting
- Rejects malformed messages
- Configuration through plain text files
- Qmail-style address aliases support
- Sends delivery status notifications
- Manual for installation included
- Local mail delivery agent optional
- Supports virtual mail accounts
- Efficient local mail delivery
- Closed mail relay by default
