Apps similar to Proxmox Mail Gateway include mailcow: dockerized, which is free and open source. Other options are SpamAssassin, MailScanner, Rspamd and Scrollout F1. You can choose from more than 10 Anti-Spam Tools like Proxmox Mail Gateway for Linux, self-hosting, Mac, Windows and the web.
mailcow is a mail server suite based on Dovecot, Postfix, SOGo, Rspamd and other open source software, that provides a modern Web UI for administration.
Germany
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Use this program to "Unspam" your mailbox(es). The program can be integrated with the mail server to automatically filter all mail for a site. It can also be run by individual users on their own mailbox and integrates with several mail programs.
MailScanner is a open source email security system design for Linux-based email gateways. It is used at over 30,000 sites around the world, protecting top government departments, commercial corporations and educational institutions.
Scrollout F1 is a free self-hosted email gateway designed for Linux & Windows administrators without advanced email security experience.
BelgiumEU
Xeams is a secure and powerful mail server for that includes a powerful spam filtering engine that eliminates up to 99% of junk email right out of the box. The software offers a flexible approach to email, making it a very user friendly server.
EuropeanMX blocks incoming spam and virus emails before they are reaching your network. With our outgoing filter you can secure your server's reputation. And last but not least we are offering encrypted cloud storage to archive all your emails.
GermanyEU
The oikik hosted antispam system is divided into multiple filtering layer that a message passes through prior to being delivered to your inbox. If a message successfully passes through every stage of filters, it gets placed into a delivery queue, and is sent along to your mail...
The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, self learning Hidden-Markov-Model and/or Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning...
I’m personally getting a lot of Junk emails, one of the reasons is having a few LLC companies. A lot of other companies are trying to fix some issues (that don’t exist) or offer some services (that I don’t need).
United States
Mox is a modern full-featured open source secure mail server for low-maintenance self-hosted email.
A Linux based email gateway that filters email for viruses, spam, malware, phishing, and other threats. Works with any email server and any email provider such as Office 365.
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