What are some alternatives?
When comparing Rspamd and Scrollout F1, you can also consider the following products
SpamAssassin - Use this program to "Unspam" your mailbox(es).
MailScanner - MailScanner is a open source email security system design for Linux-based email gateways.
Proxmox Mail Gateway - Protect mail server against spam, viruses and malware with Proxmox Mail Gateway security for businesses, government, education and non-profit organizations.
amavisd-new - amavisd-new is a high-performance interface between mailer (MTA) and content checkers: virus...
Mailwasher - Over 8 million people use MailWasher as their spam filter
Symantec Messaging Gateway - Anti-spam gateway blocks more than 99% of spam with less than one in 1 million false positives and...