Removing 'on behalf of' when sending mail using MailGun

Question

I\'m trying to figure out how to send mails using the MailGun Golang API without having it sent \'on behalf of\'.

This is how the From address currently looks (where f

Answer 1

Are you trying to send from a different domain than the one you setup SPF/DKIM on?

You can only send white-labelled emails from the domain you're authorized with Mailgun.