Since the posting guidlines asks for similar products with this feature, here are the idea forms from other platforms to show that there is a market need for this. For example, there has been a request for this on the Salesforce form since 2006.
Allow for multiple email addresses to be associated | Feedback & Ideas
Click Dimensions does allow this through the “Optional Advanced Settings” on an email send by selecting the email address field you wish to use.
https://support.clickdimensions.com/hc/en-us/articles/115001156073-Create-an-Email-Send