usps.com
The most popular site among mail center managers.
postalpro.usps.com
One of the most helpful websites for Postal Information.
postcom.org
Web site for the Association of Postal Commerce. Here you can obtain updates on postal related news and issues.
nacums.org
A networking forum for mail center managers on university and college campuses.
npf.org
Sign up for or find out more about the National Postal Forum.
mailmovesamerica.org
Keep up on legislation in your state concerning Advertising Mail.
Panhandle PCC 