Making your email work on an iPhone is tricky to say the least.
One of our customers generously agreed to share her screens and the information that she has entered into those fields and these settings work on her iPhone. We have removed her personal info and replaced it with instructions of what you should enter into that field.
Example: When it asks for Incoming and Outgoing Servers and SMTP it should read mail.yourdomainname.com or whatever your actual domain name is.
IMAP Account information
Name: (Your actual name like) "John Doe"
Email: (Your actual email address for example) john@yourdomainname.com
Description: Anything you want here. "My Mail" or anything else saying what this email is for.
INCOMING MAIL SERVER
Host Name: (Your actual domain name Example) mail.yourdomainname.com
User Name: (Your email address with a + instead of & Example) john+yourdomainname.com
Password: Your Password here
OUTGOING MAIL SERVER
SMTP: (Your actual domain name Example) mail.yourdomainname.com
Server: Switched On
OUTGOING MAIL SERVER
Host Name: mail.yourdomainname.com
User Name: john+yourdomainname.com
Password: Enter Password
Use SSL: Switched on
Authentication: Password (Required by our server)
Server Port: 465
MAILBOX BEHAVIORS
Drafts Mailbox: Drafts
Sent Mailbox: Sent
Deleted Mailbox: On My iPhone
Archive Mailbox: Archive
MOVE DISCARDED MESSAGES TO
Deleted Mailbox: CHECKED
Archive Mailbox: Not Checked
DELETED MESSAGES
Remove: After one Week
DELETED MESSAGES
Remove: After One Week
INCOMING SETTINGS
USE SSL: TURNED ON
Authentication: Password
IMAP Path Perfix: /
Server Port: 993
S/MIME
Sign: No
Encrypt By Default: No