AMAZON SES unable to send email to forward only email addresses

I have setup Amazon SES to work with keycloak. SES is sending out email verification correctly upon signups.

However, if a user uses a forward-only-email-address while registering, SES does not send the verification email. Instead admin (From address) gets an email from

MAILER-DAEMON@us-east-2.amazonses.com

to From account

Does SES require special setup for sending out email to a forward-only-email-address (email a开发者_如何学Cddress that does not have actual mailbox associated with)