Follow these steps to install the mail profile to automatically map the proper IMAP/SMTP settings:
// Go to site:
Webmail
// Login with your email and password
// Click the round circle (should have your initials in it) at the top right.
// Select “Download iOS Profile”
// It should ask if you want to install it – say yes.
// Go to “Settings” – you should see the new profile on the top of the list.
// Tap it and tap install
// You might have to type in your iPhone password to install.
// Once install you should start seeing your email.