How It Works

1. Donate
   Donate $5 to a participating charitable organization of your choice and receive 500 CentMail stamps.
2. Stamp
   Promote your favorite cause by attaching a CentMail stamp to each email you send.
3. Verify
   Anyone you email can automatically verify your donation and confirm you're not a spammer. Since spammers send millions of emails every day, it is prohibitively expensive for them to donate even just 1¢ per email.