Please review the included screenshots to configure your iPhone to use YVOD’s email services.
Settings / Mail, Contacts, Calendars / Accounts
SMTP
Advanced
Authentication
Note: It is possible that you will need to set Authentication to Password instead of MD5 Challenge-Response. I have also found that even when I make this change in Authentication, sometimes it only works after I shut the phone off and then power it on again.
I suspect that the phone will go out and try to make a connection to our email server. If you change the Authentication before it has time to cycle through and fails at all its attempts, it gets confused. Always keep a little patience in your back pocket when altering the settings for email ;)