Expected response code 250 but got code "550", with message "550 Bad HELO - Host impersonating domain name [mydomain.com]

I can send mail from local without any errors but dont send email from VPS.

Expected response code 250 but got code "550", with message "550 Bad HELO - Host impersonating domain name [golrizpaper.com] "

.env file:

MAIL_DRIVER=smtp
MAIL_HOST=mailservice4.irandns.com
MAIL_PORT=25
MAIL_USERNAME=info@golrizpaper.com
MAIL_PASSWORD='******'
MAIL_ENCRYPTION=null

Any idea how to solve this?

via Chebli Mohamed