Hi Folks:
Thanks for your replies. As I mentioned in the original thread, the links to our site are contained in the signature to our emails. Norton flags each one of those links as a suspicious link, which means any Norton user who receives an email from us will be warned not to click the links or to do so using Isolation mode. I posted an image in the first message; if you hover over one of the flagged (red) links it pops up a message. Here's a better example:

