Hi Slickpig,
Thank you for getting in touch via our support forums,
I'm sorry that as a non customer your support experiance thus far has not met your expectations, hopefully I can change that for you.
I have had a manual investigation done on your IP address and it does appear that we have had some suspicious activety from this IP address in the past, maybe from before you were using the IP address on your mailgateway or maybe if your server had been used as an open relay in the past.
As a result of this information your IP was flagged on our systems, I have had this flag removed which should prevent it from being relisted again unless we see new suspicious activity from your IP.
If there is anything else I can assist you with please don't hesitate to let me know
Kind Regards
Richard Brittain
Tier2 Senior Technical Support Engineer,
Symantec Corporation