Poste.io
Full featured email server built in docker with free plan.
16 Alternatives To Poste.io
Citadel
Is a collaboration suite (messaging and groupware).
Dovecot
Dovecot is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with…
Emails
Simple, easy and secure mail server with a convenient and simple interface.
Eudora Internet Mail Server
Eudora Internet Mail Server is a highly advanced internet mail system that supports the all kind of email systems and clients either it is IMAP, POP3, SMTP and much more.
G Suite
Google’s encompassing suite of cloud-based business apps.
Horde
Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Kopano
Sharing & communication software for business
MDaemon Messaging Server
Low cost, easy to use Email Server software for virtual, on-premise, or hosted deployments for…
Mail-in-a-box
Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.
MailEnable
MailEnable is a Windows based mail server and email server program that is packed with the state of the features and functions like antivirus and spam filtering system, webmail management system, cardDAV, CalDAV and much more.
Microsoft Exchange Server
Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.
ProtonMail
Secure email with absolutely no compromises. Get your free encrypted email account today.
Roundcube
Web-based IMAP email client
Zimbra Collaboration Suite
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.
Zoho One
Zoho is an all-in-one online office suite.
iRedMail
A fully fledged, free email server solution, an open source project (GPL v2).