why can't i access all my mailboxes from my i phone
why don't all my messages that are in my inbox on the computer show in my inbox on my i phone
Your computer may be removing the messages from the server, and removing them from your phone... Which email program are you using?
Have you been able to find out what was causing that issue? Like kevinds mentioned, the e-mail program on your computer may have a setting enabled which is removing the messages from the server after downloading them. If you're using the Exchange set-up on your iPhone, this would remove the messages from your iPhone as well. What is the name of the e-mail program that you're using on your computer?
Retrieving data ...