Step 3. Set up your new IMAP email account on all of your devices – but only this one account. As all of the emails sit on a server, they will show up on all of the devices, looking the same. While this may seem a bit complicated, once you go through the steps, it will make more sense. If it does not make sense, you can always check the FAQs of your email provider, as well as the manual for your mobile devices. These places should have additional information.