iPhone 6 and emails

[#1]

I have an iPhone 6 and can't send emails unless I'm at home. I also have an iPad and location is never a problem. Can you please help me fix the problem?

[#2 · Accepted solution]

It sounds to me a classic case of lack of SMTP authentication.

On the iPhone

> Settings

> Mail, Contacts, Calendars

Select the account under "account"

Then

> Account

> Outgoing Mail Server

> Authentication

and select "password"

If you can't change, it add a new SMTP server which is authenticated and turn the other one off for the account.