Mobile/Pager filters are designed to send your messages to your phone through an SMS gateway. In order to get the maximum information into the 250 characters of an SMS, we automatically condense messages if you select the filter actions "Send to my Mobile/Pager" or "CC my Mobile/Pager".
If you don't want to send your email via SMS, but rather want to access your Pobox email from your smartphone, you will need to have a Mailstore account.