Right now we can set up a dedicated domain for the agency that is used to send emails like password resets, account creation emails, etc. The problem is if the sub-account does not specify a custom domain that domain is also used. The very domain that is so important for our agency email deliverability is used to send emails from all those sub-accounts that don't have dedicated domains that can make our agency level subdomain unusable to where all emails end up in spam. I would like to advocate that we be able to create a dedicated sending domain for our agency that is ONLY used by the agency and we be allowed to create another dedicated domain which is then used to send mail from accounts that don't have their own dedicated domain. This way we can manage our sending reputation for out agency level subdomain to where it is very likely to be delivered to the inbox.