To accomplish this, add the following smtpd_sender_restrictions to your main.cf to receive email only from my@domain.com:
#/etc/postfix/main.cf
smtpd_sender_restrictions = check_sender_access regexp:/etc/postfix/mine_only
#/etc/postfix/mine_only
/^my@domain.com$/ OK
/^/ REJECT
Article ID: 118, Created: 4/23/2025 at 3:55 PM, Modified: 4/23/2025 at 3:55 PM