iMail Alternatives [Page 4]

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.

Open Source

Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.

Visit website paid $19.5 / Monthly (Pro)

qmail is the name of an advanced level of mail transfer agent for the UNIX based operating systems.

Zendo allows you to sell productized, subscription and custom services. Collaborate and collect payments. Create quotes and invoices. Eliminate multiple tools and enjoy the simplicity.

freemium $19.0 / Monthly (Per each seat)

OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices.

Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.

$29.0 / Monthly (Basic)

Modoboa is a mail hosting and management platform including a modern and simplified Web User Interface.

Third party hosting for Microsoft Exchange services.

grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

Open Source

Horde Groupware is a free, enterprise ready, browser based collaboration suite.

Xeams is a secure and powerful mail server for that includes a powerful spam filtering engine that...

EmailSuccess is an advanced MTA built to handle the most critical reliability, performance, security, and deliverability requirements.