smtpd_recipient_restrictions =
        reject_non_fqdn_sender,
        reject_non_fqdn_recipient,
        reject_unknown_sender_domain,
        reject_unknown_recipient_domain,
        permit_sasl_authenticated,
        permit_mynetworks,
        reject_unauth_destination,
        reject_rbl_client zen.spamhaus.org,
        reject_rbl_client ix.dnsbl.manitu.net,
        check_policy_service inet:127.0.0.1:10023,
        reject_unverified_recipient,
        permit

postfix/smtpd[22142]: maps_find: local_recipient_maps: myuser: not found
postfix/smtpd[22142]: dict_proxy_lookup: table=unix:passwd.byname flags=lock|utf8_request key=@mydomain.com -> status=1 result=
postfix/smtpd[22142]: maps_find: local_recipient_maps: @mydomain.com: not found
postfix/smtpd[22142]: mail_addr_find: myuser@mydomain.com -> (not found)
postfix/smtpd[22142]: NOQUEUE: reject: RCPT from senderdomain.de[185.26.XX.XX]: 550 5.1.1 <myuser@mydomain.com>: Recipient address rejected: User unknown in local recipient table; from=<myuser@senderdomain.de> to=<myuser@mydomain.com> proto=ESMTP helo=<senderdomain.de>
postfix/smtpd[22142]: > senderdomain.de[185.26.XX.XX]: 550 5.1.1 <myuser@mydomain.com>: Recipient address rejected: User unknown in local recipient table

_LAST_CACHE_CLEANUP_COMPLETED_    1552662532
myuser@mydomain.com    0:0:1552662532:250 2.1.5 OK