Exim Alternatives [Page 7]

OPNsense® you next open source firewall. Free Download. High-end Security Made Easy™. Offers Intrusion Prevention, Captive Portal, Traffic Shaping and more.

Open Source

Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.

Open Source paid $2.95 / Monthly (25GB)

Warm up your cold email inbox, and never land in spam anymore!

Try for free freemium $9.0 / Monthly

Email, calendars, and contacts to highest standards of security, privacy and reliability.

paid Free Trial $3.0 / Monthly (per user)

Open-Xchange Server 6 is the most advanced Linux based Groupware solution f.

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

Google's encompassing suite of cloud-based business apps.

Apache James is a pure Java SMTP, POP3 enterprise mail server.

Open Source

maildrop is a Mail delivery agent used by the Courier Mail Server. The maildrop MDA also includes filtering functionality. maildrop receives mail via stdin and delivers in both Maildir and mbox formats.

Lightweight, cross-platform SMTP client

Open Source

Use this program to "Unspam" your mailbox(es).

Open Source

Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.

Twilio SendGrid Email API is a conversation platform that consists of the module, which enhances your communication strategies and interacts with consumers to get their response and improve your business quality.

Salesforce B2B marketing automation