Thexyz - Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.
Postfix - Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.
ZixArchive - ZixArchive is a cloud-based solution to collect, store and search archived emails.
sSMTP - sSMTP is a simple MTA to deliver mail from a computer to a mail server.
Archive2Azure - Archive360's email archive solution retains your data in your own cloud tenant. Say NO to proprietary email archive software that own your encryption keys.
OpenSMTPD - OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with...