Windows and Linux
Spam, phishing emails, email viruses, unwanted newsletters, unwanted email.
MWES is fully featured and free to use for the first 30 days. After 30 days, you must purchase a license to continue to use MWES.
License to install on 1 server. Includes 1 years use of all new versions, updates, real-time spam blocking and customer support. License costs $449 for unlimited users and domains. ($199 for under 10 users)