El Capitan Update Mail.app Problem
I have several e mail accounts in my apple mail app. After updating to El Capitan 10.11.1 all the accounts got disconnected. After several hours of chat, calls and support guidance no one could help me. Godaddy said (cause the accounts are all POP) that I had to remove each account and create them again (loosing my information).
I went and deleted one account but didn't help. So what worked for me (at last) was unchecking one tiny option cause every time I changed the ports it automatically reset them.
Im attaching images with the settings that worked for me on my Godaddy POP accounts.
Hope someone finds this helpful.
iMac, OS X El Capitan (10.11.1), 27"