we created the service theothermail.com to generate throwaway email addresses that forwards emails to your original inbox, you don't need to use your personal email address to sign up for a newsletter
TheOtherMail generates throwaway email addresses so you can try new products and services with no risk. We deliver all emails from your generated accounts to your personal email address so you don't have to remember stupidly long emails.
We spend a few dollars per month to run it, and we haven't made any money yet.
Give it a try!