Proxmox Mail Gateway Alternatives

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

Open Source

MailScanner is a open source email security system design for Linux-based email gateways.

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.

Visit website paid $19.5 / Monthly (Pro)

Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules...

Scrollout is a free and easy to use anti-spam email gateway designed for Linux & Windows administrators without advanced email security experience.

Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

A fully fledged, free email server solution, an open source project (GPL v2).

Open Source

An open source mailserver suite.

Open Source

Fortinet Email security is designed to block ransomware, phishing, and other cyber threats seeking entry via incoming email and outgoing messages don’t improperly leak sensitive data.

Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

Anti-spam gateway blocks more than 99% of spam with less than one in 1 million false positives and...

Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.

Open Source Free Trial $0.81 / Monthly (Per User)

The free Anti-Spam-Filter Spamihilator removes more than 98% of spam mails before they even get into your inbox.

Oikik is a cloud-based email filtering service that works with your existing email service.