The Advanced Interface of the Web version of UBmail (Central Email) is incompatible with Firefox 4. Use either the Basic (Default) or Simple (Ajax) interfaces instead or use a browser other than Firefox 4 to log into your email account.
When email messages (that you have not deleted) go missing from your Inbox, the most likely cause is that your email client is set up to use POP, which is a protocol that downloads messages to your computer while removing them from the email server.
If you are switched from UBmail (Central Email) to another email system and need to access your old messages in order to forward them to your new system, you can access them during the 30-day period using the following URL
Find Your UBITName
Your UBITName is your key to IT services such as email, MyUB,
ResNet, My Virtual Computing Lab and UBlearns.