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.
19 Alternatives To Mail-in-a-box
MDaemon Messaging Server
Low cost, easy to use Email Server software for virtual, on-premise, or hosted deployments for…
Mailpile
Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
Outlook
Organize your world. Outlookâs email and calendar tools help you communicate, stay on top of what matters, and get things done.
ProtonMail
Secure email with absolutely no compromises. Get your free encrypted email account today.
Sanebox
SaneBox is a cloud-based service that allows users to filter and manage their emails.
Zimbra Collaboration Suite
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.
eM Client
eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.
mailcow dockerized
An open source mailserver suite.