My ISP Comcast block a heap of legimate email for no apparant reason, it's a real pain so I mostly use a Gmail account now which is a lot more forgiving (and better anti-spam).
I know PC Tools had trouble contacting me at one point, and I got pretty irate because I thought they hadn't replied. After I sent 3 emails each getting a little more angry; I got a phone call (!) saying they were trying to email me and it obviously wasn't working so they answered the question and I gave them another address. Needless to say I was pretty impressed...
There have been times when their reponses have been slow (up to 3-days), but generally it's sub 24hrs and I don't really need to contact much now so can't comment on the recent history.
Why don't you just call them, it's a free call in the US, and they'll do it over the phone...
http://www.pctools.com/contact/ - Sales & Support: 1-800-764-5783.
>> Smirk
BTW; PC Tools
aren't blocked for abuse; there are several sites that can check this... e.g.
http://www.dnsstuff.com/tools/ip4r.c...%3Dpctools.com