`Sender address rejected: not owned by user` in Postfix

I am getting the following error when I try to send an email from a client on my home computer through my authenticated SMTP server, to receiver@gmail.com.

Oct 17 09:21:40 debian postfix/smtpd[1643]: NOQUEUE: reject: RCPT from
unknown[x.x.x.x]: 553 5.7.1 <sender@example.com>: Sender address rejected:
not owned by user sender@example.com; from=<sender@example.com>
to=<receiver@gmail.com> proto=ESMTP helo=<[192.168.1.5]>

I'm ultimately looking for a fix for the error, but I'm currently wondering what configuration parameters in main.cf are able to fix it. For example, should I fiddle with smtpd_sender_restrictions, smtpd_relay_restrictions, or smtpd_recipient_restrictions?
I am unable to remove the error by making any of the previous parameters as permissive as possible.

Edit: Here is the relevant part of my current configuration, although I am mainly looking for a couple possible Postfix parameters that could be causing the address to be rejected.

relay_domains = *

smtpd_sender_restrictions =
    permit_mynetworks,
    permit_sasl_authenticated

smtpd_relay_restrictions =
    permit_mynetworks,
    permit_sasl_authenticated,
    reject_unauth_destination

smtpd_recipient_restrictions =
    permit_mynetworks,
    permit_sasl_authenticated,
    reject_unauth_destination,
    reject_rbl_client zen.spamhaus.org,
    reject_rhsbl_reverse_client dbl.spamhaus.org,
    reject_rhsbl_helo dbl.spamhaus.org,
    reject_rhsbl_sender dbl.spamhaus.org,

smtpd_data_restrictions = reject_unauth_pipelining

And in master.cf:

submission inet n       -       -       -       -       smtpd
    -o smtpd_tls_security_level=encrypt
    -o smtpd_sasl_security_options=noanonymous
    -o smtpd_client_restrictions=permit_sasl_authenticated
    -o smtpd_sender_restrictions=reject_sender_login_mismatch