SES on 1 brand, SMTP on another
I've been running with a single brand and sending via SES. I want to send via another delivery provider (over SMTP) on a separate brand. There are no external clients- I'm controlling both brands, but setting them up separately so that I can use different providers. When setting up the second brand, I entered the SMTP settings of the other provider (SendGrid). When I go to send via SendGrid on the second brand, however, it's still sending via SES. Is it possible to have this configuration, without removing SES credentials (and having to add them back later when I want to send from the first brand via SES)?