Hello,
It seems that after the work you have done your servers, access via my mobile devices is no longer granted. I have my email on my laptop without issues, even installed on a separate computer the account without issues but my cell phone (android) and my tablet (android) do not allow me in and keep on repeating the question that i should check my email address.
It started with the request to re-enter my password. I took the accounts off and reinstalled them, did not work. I cleared cache, did not work, I installed on another laptop (Outlook), worked immediately. Installed on another phone (Android), did not work.
What has changed and/or what can I change to solve this. It must have to do with the work you did.
Thanks,
Ronald