First sorry for my English level...
I have a platform which send mail when a client sign in. I use mailgun. Send works with domains like hotmail, gmail or ***.net (which is based on gmail). But when I try to send to domain like ***.eu it doesn't work.. On mailgun configuration I disable "certificate verification" for outgoing mails.
I use the framework Laravel.
This is the error message that mailgun shows to me :
Failed: postmaster@mg.***.***.eu → name@***.eu 'A new user registered on the plateform.' Server response: 552 552 sorry, your envelope sender domain must exist [mail115] (#5.7.1)
or :
Will retry in 900 seconds: postmaster@mg.***.***.eu → name@otherdomain.eu 'Welcome !' Server response: 450 450 4.1.8 : Sender address rejected: Domain not found
Thanks for your response...