Postfix SASL LOGIN: 535 5.7.8 Ошибка аутентификации: неверный пользователь / пароль

Я пытался настроить свой почтовый сервер postfix (mailclient -> postfix / relay host - -> smarthost / mailprovider) и получил следующие ошибки при отправке писем:

luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 535 5.7.8 Authentication failed: wrong user/password

My mail.log

....
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 220 smtp.strato.de ESMTP RZmta (P16 -)
luke postfix/smtp[9059]: > smtp.strato.de[81.169.145.133]:587: EHLO luke.mydomain.de
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-smtp.strato.de greets 87.134.30.76
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-ENHANCEDSTATUSCODES
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-PIPELINING
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-8BITMIME
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-DELIVERBY
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-SIZE 104857600
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-AUTH PLAIN LOGIN CRAM-MD5 DIGEST-MD5
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-STARTTLS
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-BURL imap
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250-CHUNKING
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 250 HELP
luke postfix/smtp[9059]: match_string: smtp_sasl_mechanism_filter: plain ~? plain
luke postfix/smtp[9059]: match_string: smtp_sasl_mechanism_filter: login ~? plain
luke postfix/smtp[9059]: match_string: smtp_sasl_mechanism_filter: login ~? login
luke postfix/smtp[9059]: match_string: smtp_sasl_mechanism_filter: cram-md5 ~? plain
luke postfix/smtp[9059]: match_string: smtp_sasl_mechanism_filter: cram-md5 ~? login
luke postfix/smtp[9059]: match_string: smtp_sasl_mechanism_filter: cram-md5 ~? cram-md5
luke postfix/smtp[9059]: match_string: smtp_sasl_mechanism_filter: digest-md5 ~? plain
luke postfix/smtp[9059]: match_string: smtp_sasl_mechanism_filter: digest-md5 ~? login
luke postfix/smtp[9059]: match_string: smtp_sasl_mechanism_filter: digest-md5 ~? cram-md5
luke postfix/smtp[9059]: match_list_match: DIGEST-MD5: no match
luke postfix/smtp[9059]: server features: 0x103f size 104857600
luke postfix/smtp[9059]: Using ESMTP PIPELINING, TCP send buffer size is 46080, PIPELINING buffer size is 4096
luke postfix/smtp[9059]: smtp_stream_setup: maxtime=300 enable_deadline=0
luke postfix/smtp[9059]: > smtp.strato.de[81.169.145.133]:587: STARTTLS
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 220 Ready to start TLS
^^^^^^^^^^^^^^^^^^^^starting TLS ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
....

luke postfix/smtp[9059]: server features: 0x102f size 104857600
luke postfix/smtp[9059]: Using ESMTP PIPELINING, TCP send buffer size is 46080, PIPELINING buffer size is 4096
luke postfix/smtp[9059]: maps_find: smtp_sasl_password_maps: hash:/etc/postfix/sasl_password(0,lock|fold_fix|utf8_request): michael@mydomain.de = michael@mydomain.de:MeinGeheimnis
luke postfix/smtp[9059]: mail_addr_find: michael@mydomain.de -> michael@mydomain.de:MeinGeheimnis
luke postfix/smtp[9059]: smtp_sasl_passwd_lookup: host `smtp.strato.de' user `michael@mydomain.de' pass `MeinGeheimnis'
^^^^^^^^^^^^^^^^^^^^^ The sasl_password_lookup gives correct results for host + user + pass ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
luke postfix/smtp[9059]: starting new SASL client
luke postfix/smtp[9059]: name_mask: noplaintext
luke postfix/smtp[9059]: name_mask: noanonymous
luke postfix/smtp[9059]: smtp_sasl_authenticate: smtp.strato.de[81.169.145.133]:587: SASL mechanisms PLAIN LOGIN CRAM-MD5
luke postfix/smtp[9059]: > smtp.strato.de[81.169.145.133]:587: AUTH CRAM-MD5
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 334 PDNkZWI3NDM4ODNkOTk5ODE3MDBlMmMyOWZkQHNtdHAuc3RyYXRvLmRlPg==
luke postfix/smtp[9059]: xsasl_cyrus_client_next: decoded challenge: <3deb743883d99981700e2c29fd@smtp.strato.de>
luke postfix/smtp[9059]: xsasl_cyrus_client_get_user: michael@mydomain.de
luke postfix/smtp[9059]: xsasl_cyrus_client_get_passwd: MeinGeheimnis
luke postfix/smtp[9059]: xsasl_cyrus_client_next: uncoded client response michael@mydomain.de f932fcf1bcee82d97b2e7b577df016c3
luke postfix/smtp[9059]: > smtp.strato.de[81.169.145.133]:587: bWljaGFlbEByb2VzbGVydGVzcGUuZGUgZjkzMmZjZjFiY2VlODJkOTdiMmU3YjU3N2RmMDE2YzM=
luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 535 5.7.8 Authentication failed: wrong user/password
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Я не понимаю причину и ошибки.

Мой postconf -n:

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
canonical_maps = hash:/etc/postfix/canonical
compatibility_level = 2
inet_interfaces = 127.0.0.1 192.168.178.19
inet_protocols = ipv4
mailbox_size_limit = 0
mua_client_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination
myhostname = luke.MyDomain.de
mynetworks = 127.0.0.0/8 192.168.178.0/24
readme_directory = no
recipient_delimiter =
sender_dependent_relayhost_maps = hash:/etc/postfix/sender_dependent
smtp_connection_cache_on_demand = no
smtp_sasl_auth_enable = yes
smtp_sasl_auth_soft_bounce = yes
smtp_sasl_mechanism_filter = plain, login, cram-md5
smtp_sasl_password_maps = hash:/etc/postfix/sasl_password
smtp_sasl_security_options = noplaintext, noanonymous
smtp_sasl_tls_security_options = noplaintext, noanonymous
smtp_sender_dependent_authentication = yes
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_relay_restrictions = $mua_client_restrictions
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_loglevel = 2
smtpd_tls_received_header = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes

• Postfix version = 3.3.0
• libsasl2 Ubuntu 18.04.04
• последнее обновление && обновление сегодня

Спасибо за помощь.