I made an account with gmail for the new project a year ago and used it to register in programs. I gave my real e-mail to 20 programs that didn't accept free e-mails and had to change my adress..
I logged in to gmail today!!
914 e-mails
711 in spam
------------
total 1655
We use about 250 programs for the project so it's 6.62 e-mails per sponsor

There are good guys that are using e-mail for important news, but some are really misusing this art of comunication...
What really pissed me is that among 711 spam e-mail most were spermamax viagra rolex etc.!!! We used this e-mail only for registration. How the fuck did hahahaha-guys got my email adress???
I don't blame any sponsors.
But think about the security of the data you collect.
I have lost my main e-mail account that i used for 5 years after giving it to 20 programs. How happy am i that i used another e-mail for others...
For webmasters:
Make an e-mail like
[email protected] and redirect all the mail to google. Check for updated there keep your private mailbox clean. Now i know that you will get spammed with viagra if you just register in some programms.