Postfix develiver fail , no return mail message

Hi All
I have configure my postfix on SLES15SP4
it been enable imaps/SMTPs and could send mail to google/O365 using TLS protocol
it seem work fine.
but I have a issue to let me confused.
when a mail with incorrect user address or no such user address.
postfix send and /var/log/mail show like below

550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient’s email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 Fix bounced or rejected emails - Gmail Help s187-20020a625ec4000000b0064ebd286b56si32819pfb.224 - gsmtp (in reply to RCPT TO command))

but user mailbox seem not receive any return mail or message…
Is it normal ?? or which postfix or Dovecot configure I need modify to let user receive these mail to know these mail has incorrect message ?