Here are some of the ways SpamAssassin can be used:
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- UsedViaProcmail: run from the traditional UNIX .procmailrc file
- UsingSiteWide: using SpamAssassin site-wide
- IntegratedInMta: built into the whole mail-delivery process in the Mail Transfer Agent (sendmail, Exim, Postfix etc.)
- MailProxy: as a proxy server
- Run against a RemoteImapFolder
- UsingOnOsx
- UsingOnWindows
- CommercialProducts: commercial products that use SpamAssassin internally