Here's a how too get one if your email is not acepted, confirm to work as I just did it.
Go to
Free Web Hosting Services -- 50megs.com, register you a FREE account. Once you have validate your account through your email, go back and set up your free email, it will have a
username@yourdomain.i8.com
Use that to register at symbiansigned.com and that is also the email where you will receive your activation code for symbiansigned.
Hurry before they block it too.