MailCleaner - Cloud & on-premise anti spam software for businesses
MailDrop - 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.
SpamTitan - Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.
InboxKitten - An open-source, disposable email service π
Sanebox - SaneBox is a cloud-based service that allows users to filter and manage their emails.
Unroll.me - Unroll.