List of the Top 3 Anti-Spam Software for Postfix in 2025

Raptor Email Security is an MX-based system crafted by specialists to effectively block spam, phishing attempts, and malware threats, employing an innovative scoring system along with various technologies like ClamAV, MIMEDefang, and Sendmail. Our dedicated team of spam experts guarantees a spam-free experience, resulting in zero spam and zero support tickets while doubling your resources. By routing your emails through our servers, your system gains robust protection against most cyber threats, allowing you to expand your hosting revenue by adding additional accounts and optimizing resource use. Enhanced by Raptor Review, our service offers a thorough evaluation of your email setup, featuring a premium support line to address issues such as spam blocking, delivery enhancement, scam detection, and recovery of lost emails. Setting up Raptor Email Security is quick and easy, taking just a few minutes, and you can enjoy a complimentary 30-day trial to experience its benefits firsthand. With this solution, you can ensure that your email communication remains secure and efficient while gaining peace of mind.

Protect against ransomware, spam, phishing, and a range of other cyber threats that pose risks to small and medium-sized businesses, large enterprises, healthcare institutions, and government bodies, including their contractors. MailRoute provides API-level integration with platforms such as Microsoft Office 365 & GCC High, Google Workspace, and other email service providers, effectively reducing the likelihood of email-related attacks that could jeopardize sensitive information and systems. Our service delivers an affordable, multi-layered defense strategy that aligns with CMMC, NIST 800-171, HIPAA, and DFARS compliance, and is recognized by DISA for its email security capabilities. Built to eliminate any single point of failure, our fully owned infrastructure includes geo-distributed data centers that are outfitted with redundant network connections, power sources, and cooling systems, achieving a remarkable uptime of 99.999%. In addition, MailRoute combats email forgery and spoofing through sophisticated email authentication methods and managed DNS adjustments. By continuously overseeing and updating your email network security, we mitigate cyber threats and lessen risks like operational downtime, fostering both predictable costs and dependable services. Our ongoing commitment to reinforce email security reflects our determination to protect your digital assets from the constantly changing landscape of cyber threats, ultimately ensuring peace of mind for your organization. As the digital world evolves, so does our approach, adapting to new challenges to offer the best protection possible.

Rspamd was created in response to the dramatic rise in email traffic over the last ten years, which has increased by over ten times. From its beginning, the focus of the project has been on high-volume mail systems, emphasizing speed and efficiency during its development. Built using the C programming language, Rspamd utilizes a range of techniques to facilitate quick performance, especially on modern hardware. Interestingly, it can also run proficiently on lightweight embedded devices. To grasp its remarkable speed capabilities, one can look at a recent article analyzing its performance. Rspamd is recognized as a more effective substitute for the SpamAssassin mail filter, enabling it to examine up to ten times more messages while applying the same rules through a dedicated SpamAssassin plugin. A comparative graph that shows the shift from SpamAssassin to Rspamd highlights a significant decrease in CPU usage on scanning servers. Additionally, Rspamd is designed to work seamlessly with popular mail transfer agents like Postfix, Exim, Sendmail, and Haraka, which enhances its adaptability for a variety of email environments. This compatibility ensures that organizations can easily incorporate Rspamd into their current systems without extensive modifications, allowing for a smoother transition to improved email filtering solutions.