Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
SpamAssassin - Use this program to "Unspam" your mailbox(es).
Gmail - Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.
MailScanner - MailScanner is a open source email security system design for Linux-based email gateways.
Zoho Mail - Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.
Rspamd - Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules...