OSX Yosemite security update broke email login

[#1]

I recently did a OSX security update that has moved login data into a generic "Internet Accounts" pref page.
It seems to have broken Mails ability to login to plusnet mail servers.
Anyone else seen this or know how to fix it?

[#2]

http://community.plus.net/forum/index.php/topic,132198.msg1209855.html#msg1209855 and a few posts after

[#3]

Thanks yes finding those other threads now.  Just didnt spot the different topics.   Very frustrated 😉
[Moderator's note by Jim (Oldjim):  Full quote of preceding post removed as per the Forum Rule]
As suggested in the posts I set the following and it now works..
Do this in advance tab from Mail Prefs
Important bits being Set Auto detect ON  at top
and DONT "use ssl" (after port)