From Email Option - Unable to use Bravo for SMTp Server

I am trying to set up Bravo (Previously Sendinblue) as my SMTP server for emailing my clients. The way they work is you can set up an SMTP relay server and verified senders. The SMTP uses your account email address as the username for the SMTP server.

The issue is the current Manager SMTP server settings form does not allow the option to set a from email address if the username is an email address. This prevents me from using a specific email address such as or as the sender, forcing me to use my personal account as the sender.

Can we put a checkbox to add a from address, as I know it is already possible as the email address input is available when the username is not an email address?