Please can someone help point me to the right direction? Tried to search in AC documentation several times, but don't think I'm getting anywhere. Thanks a lot!!!
This is known as branding and you can add CNAME entries in your instance config files for the domains you want to send emails from .
Then add these sub-domains like *@sub-domain.com in the autorized sender mask section of the deployment wizard.
This is helpful - thanks Adhiyan for your quick response on this topic