I’m having the exact same problem.
Followed all the suggestions and still have no clue where goes wrong.
Always the following error:
“Get IMAP mail messages : Web login required.”
BTW, I’ve tried to change the port to 143, giving me another error:
“Get IMAP mail messages : A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond xx.233.xx.108:143”
I’ve googled around and found this walk around:
Tried it with my own accounts, it worked.