How to remove your Posterous account
Log in. Go to: Your settings > My Account Tab > At the very bottom there it is: “Delete account”.
Helpful Trick: Removing online data
Publicly visible text/images often aren’t properly removed even when you succeed in removing an account. Try editing or removing them manually before removing the account itself. If you’re unsure what happens to your tracks: this can be found mostly in the Terms of Service/Privacy Policy; otherwise you can always contact Posterous and ask personally. By the way, removal requests don’t necessarily mean your data will actually be removed (e.g. due to legal obligations).
Helpful Trick: Remove third-party logins
If you signed up for Posterous using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Posterous. Click here to find out how.