Where to add the recording system / DNS MX, the parent and slave zones?

Hello,

I send an email from my server via the PHP messaging function and the mail filtering system used by my server provider (externally, out of my reach) complains about the address of the server. # 39; sender

Exim failure log: "You do not have sufficient privileges to send mail to this address, please authenticate and try again."

I do not know what is the exact reason why he does not like this sender address. The filtering provider told me that the FROM address is …

Where to add the recording system / DNS MX, the parent and slave zones?