Hi pierigue. First things first: remember that every time you post your email addresses here in public there is a good chance that a bot will pick it up and add it to a few spam lists. With that in mind, be careful while posting and let's continue.
It seems that your band.com mail client is most certainly blocking x10's email at one level or another. I know that neither yahoo or hotmail will not do this. So changing your signup email sounds like your best bet. You can do this simply by registering a new account using yahoo or hotmail. The old account that you tried to sign up for will be deleted within a week as long as you never confirm any emails that do make it to your account.
Just remember that when you register a new account, that you need to link it to your forum account during the signup proccess so that we can help you better in the future.
Post back here if that still doesn't solve your problem.
