So, check the features of the Mac program carefully. In some cases theyre anti-malware only, or lack features such as parental controls, active firewall and system tuner. As usual, any non-spam messages are passed to the regular SMTP server for further processing and delivery. Plenty of the big name companies make a security product for the Mac (OS X and macOS), but it may not have all the features of its PC counterpart. Anti-Spam SMTP Proxy for Mac performs a number of configurable checks and upon detecting spam messages it will provide an immediate 5xx SMTP error code to the client. Leading Email Security for business and MSPs. Hiya is good for protection from telemarketers, robocalls, fraud. 4.9 (9) ESET Cloud Office Security provides advanced protection for users of Microsoft 365 applications with ultimate zero-day threat defense. It will intercept the dialog as it is required. Hiya is one of the best call blockers for iPhone that blocks fraud calls and sends spam alerts. It will relay the SMTP dialog between an incoming client and your SMTP server. The open source Anti-Spam SMTP Proxy Server for Mac project was designed to create a platform-independent SMTP Proxy server that implements auto-whitelists, self learning Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning, attachment blocking, Senderbase and multiple other filter methods.Īnti-Spam SMTP Proxy for Mac is a spam filter that sits on port 25 (SMTP), and if required, also on 465 (SMTPS) and 587 (submission), directly in front of your regular SMTP server.