May i ask why your using this format in your email address ?

name.name@example.com

your email should be 

name@example.com

Not problem vid that now, server admin fiks that problem now.

Have never had problem vid that mailadress.

And he had settup Mailgun for me-

Why do I not yet, a little new to this Mailgun thing.

Mailgun! no, i cant se the point.

I have gmail, so i dont need a new mail host.

What is the point of Mailgun? Certainly usable email provider, but: I have gmail and does not need more email providers! I use Oxwall. There are no plugins supporting Mailgun on the platform, no plugins for Mailgun API key. So vad is so point to add more hands on the same email broadcast!

unfortunately I didn't undertstand your last reply ((

Going back to original ( first post).
Issue is with your email account only. Am I correct in understanding that you are using Mailgun as your SMTP provider and SMTP is enabled in your admin panel?

Server administrators have fixed the problem, but they gave me tips on Mailgun. So I signed up there and the server administrator set it up for me. but if I use it, I'm well doubt, when I had to do one thing or another to use Mailgun. Nor does the point of using Mailgun. I have a mail service Gmail, do not need another one.