Sophos engine is bundled in Mailspect MPP packages. Additionally, is possible to use SAV product for your operating system and architecture. Mailspect MPP requires "sophos" list in "scan_engines" line of /usr/local/MPP/mppd.conf.xml.

For Mailspect Standard please run /usr/local/MPP/scripts/sophosmonthly.pl in order to get Sophos engine.