mailFromDomain

The custom MAIL FROM domain for the verified identity to use. The MAIL FROM domain must 1) be a subdomain of the verified identity, 2) not be used in a "From" address if the MAIL FROM domain is the destination of email feedback forwarding (for more information, see the Amazon SES Developer Guide), and 3) not be used to receive emails. A value of null disables the custom MAIL FROM setting for the identity.