I use POP3 from a rackspace webmail account. I use it on my PC and a few mobile devices.
Got a new S5 and all seems good except setting up my rackspace email.
I know all the setting are good, I can verify them with rackspace and on my other devices.
I have confirmed I have a good internet connection, both via wifi and the Vz network.
I tried setting up as IMAP instead, and the S5 also does not authenticate with the email server.
Rackspace can't help me, their settings are simple and work fine on other devices.
I've tried using my wifi and with wifi turned off.
Other mail (yahoo and gmail) both work fine.
Any good ideas?