How can limit SMTP to sending only authenticated email address ?

[sudonic]

Hi,


when I add email account in Thunderbird. I have one SMTP connection like ([email protected]) for my email and sending Email. now if I adding the another email for example ([email protected]) without SMTP setting, I can sending email with ([email protected]).

I want to my server SMTP service stop sending email from ([email protected]) without SMTP setting.

 

[cPanelMichael]

Hello

The following option in "WHM Home » Service Configuration » Exim Configuration Manager" under the "Mail" tab may be useful:

"EXPERIMENTAL: Rewrite From: header to match actual sender"

"If you enabled this option, the From: header will be rewritten to be the email address of the actual message sender. If you choose the "remote" option, only messages that are being sent to remote destinations will be affected."

Thank you.