email not working in aquamail

I have done everything possible to changing server settings to changing my passwords. Authentication rejected. At a point when I am @security type I have changed that too. StartTLS ( accept only). Then the authenticatically in box I have Chose Automatically, Do Not Login, SASL CRAM-MD5, SASL PLAIN, AND SASL LOGIN. I have tried it all. I am using Aquamail for my phone, or outlook. Got it working on my desktop, but not phone. I use IMAP not POP. Can you tell me how to fix this?