Zone Alarm Internet Security Suite LOL. I use it exculsively. I know you hate that.
For ZoneAlarm Internet Security suite. There are workaround for Incredimail. My wife had plm first time and she found the answer on Incredimail FAQ site and fixed the ZA herself quickly and now been good so far. ZA did added antispam folder in Incredimail. Works pretty effectively.
I don't know much about Anitspam other than ZoneAlarm. You can G
LE for antispam online.