Short video on how to change your mail settings on your iPhone:
I also have the settings below for quick reference.
POP3
Incoming: mail2.element74.com port: 110
“Use SSL”: Off
Outgoing: smtp2.element74.com port: 2525
“Use SSL”: Off
IMAP
Incoming: imap2.element74.com port: 143
“Use SSL”: Off
Outgoing: smtp2.element74.com port: 2525
“Use SSL”: Off
I hope this helps!