Posterous supports posting to Facebook Pages. However, there is an additional step required for Autopost for Facebook Pages to function properly.

Follow the steps here to reset your Facebook Autopost.

Note: Be sure to add the Facebook Profile that is the administrator for the Facebook Page as an Autopost destination before you add the Facebook Page. You are not required to post to both, but the profile must be added for Autopost for Facebook Pages to function properly.

Then, navigate to this page: http://www.facebook.com/apps/application.php?id=6694405826

1. Click “Add to My Page” on the left side and select the page you want to add Posterous to on your account.

2. Go to the Autopost tab after logging into Posterous.com and click Add Service.

3. Click Facebook Page and select the Page you want to autopost to.