[KB391] Can I use ESET Smart Security Premium or ESET Internet Security and a third-party antispam or firewall product at the same time?

ESET Smart Security Premium and ESET Internet Security are each tightly integrated solutions designed to function as units. We highly recommend that you do not run third-party antispam or firewall solutions in conjunction with ESET Smart Security Premium or ESET Internet Security. However, if you wish to continue using your existing antispam or firewall solution, it is possible to disable the Antispam feature and/or firewall in ESET Smart Security Premium and ESET Internet Security.