MTA

RainLoop is a web based email client.

Open Source

Warmup Inbox is a tool that automates the process of warming up your email inboxes, raising your sender reputation and inbox health automatically.

Try for free paid Free Trial $12.0 / Monthly (Per inbox, per month.)

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

Designed for those who settle only for the best — CrossBox is beautiful, dazzlingly fast, and comes with advanced features that provide you and your team with cutting-edge communication technologies.

paid €6.3 / Monthly

Save time and scale faster with accessible, secure, and reliable cloud email services. A proven multitenant email solution for telcos and service providers.

freemium $1.3 / Monthly (Per mailbox)

Agile goal and performance management

SmarterMail is a next generation email management server that is offering several business collaboration and communication features as well.

Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.

Secure email with absolutely no compromises. Get your free encrypted email account today.

freemium €5.0 / Monthly (user - 5 GB)

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.

Open Source

Send better emails, get better results

freemium $15.0 / Monthly (Essential 2500 Contacts Plan)

Email Testing for QA & Development Teams.

One of the largest and most trusted web hosting services powering millions of websites. Join Bluehost now and get a FREE domain name!