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GroupWise: The GroupWise MTA-equivalent (GroupWise Internet Agent, or GWIA) implements its own RBLs and other anti-SPAM measures. There is no easy/stock was to integrate SA into the GWIA; however, there is 3rd Party application support where this could, in theory, be done (similar to how apps that add footers onto outgoing E-Mails, like GWAVAsig, function). Note that modern GroupWise (v6.x) functions is supported on a variety of platforms, including Linux, Solaris, NetWare and Windows.
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