Open-Xchange provides an abstraction layer for spam handling. Users can mark e-mail as spam and depending on the implementation of the spam handler, this can be used to feed learning systems and other means of spam protection.
Developers can find the source code for the interface in
com.openexchange.spamhandler. It is well documented with JavaDoc, though we do at the time not automatically generate and publish HTML pages from it.
Administrators can install bundles that do spam handling. As of now, the following bundles are available: