As of now, requesters will not receive a bounce email when sending an email to unexisting freshdesk-domain email address.
In this case, if a user switches support email address from freshdesk-domain to his/her own domain email address, the requesters who send emails to old email address will not be notified that they send wrong email address and continue waiting for a reply from the agent.
So, please implement bounce email system on freshdesk.
