Courier IMAP Alternatives [Page 2]

Self hosted modern mail server

Open Source

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.

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.

The PAQATO After-Sales Experience Platform is the growth driver that makes online stores successful for tomorrow.

Visit website paid €349.0 / Monthly

SquidHub is a simple and intuitive productivity app for teams. Get the job done - for free! - Todo list, Messages, and File sharing

A software package designed to solve computationally hard problems in algebra, number theory, geometry and combinatorics.

The Mercury Mail Transport System is a mail server that sends and receives messages on behalf of a...

Mailu is a simple yet full-featured mail server as a set of Docker images.

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

Sendmail is a general purpose internetwork email routing facility that supports many kinds of...

SOGo is groupware server with a focus on scalability and open standards.

Open Source

Embedded Analytics built exclusively for SaaS applications.

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MailChimp is the best way to design, send, and share email newsletters.