Thanks for all the kind helps. I have resolved the issue and wrote a note for it.
https://notes.postno.de/how-to-use-reject-sender-login-mismatch-in-postfix.html if you find any issue in this note, please let me know. Thanks.
Oh, sorry I didn't see you weren't using smtpd_sender_login_maps. I'm pretty sure you'll need that to list the allowed logins (and/or their aliases if needed). See https://www.postfix.org/postconf.5.html for how that works.
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