Code:
[url=http://pe.usps.com/text/dmm300/notice123.htm#2568215][/url]
[url=http://pe.usps.com/text/dmm300/notice123.htm#2568215]PO Box fee list[/url]
Here's exactly what you posted in that thread. It could be that you didn't put any displayed text on your first URL. Even keeping the URL as displayed text instead of wiping it works.
As such:
http://pe.usps.com/text/dmm300/notice123.htm#2568215