warning: SASL authentication failure: unable to canonify user and get auxprops

[Azgar1998]

Hello,
I have an ubuntu server with postfix and sasl authentication. authentication works for glpi and a powershell script. when I do the same thing with ricoh copiers, I have this message:

warning: unknown[IP_RICOH]: SASL NTLM authentication failed: authentication failure
avril 25 16:05:44 server_name postfix/smtpd[86681]: warning: SASL authentication failure: unable to canonify user and get auxprops
avril 25 16:05:44 server_name postfix/smtpd[86681]: warning: unknown[IP_RICOH]: SASL DIGEST-MD5 authentication failed: authentication failure

smtpd.conf:

pwcheck_method: auxprop
auxprop_plugin: sasldb
mech_list: PLAIN LOGIN CRAM-MD5 DIGEST-MD5 NTLM
log_level: 7

main.cf:

smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_sender_login_mismatch, reject_unauthenticated_sender_login_mismatch, defer
smtpd_sender_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_sender_login_mismatch, reject_sender_login_mismatch, reject_unauthenticated_sender_login_mismatch
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_sender_login_mismatch, reject_sender_login_mismatch, reject_unauthenticated_sender_login_mismatch, defer
smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_sender_login_mismatch, reject_sender_login_mismatch, reject_unauthenticated_sender_login_mismatch
smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_sender_login_mismatch, reject_sender_login_mismatch, reject_unauthenticated_sender_login_mismatch
smtpd_delay_reject = yes
#permit_mynetworks

mydomain = domain.com
myhostname = smtp.domain.com
alias_maps = hash:/etc/aliases
#alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination =
relayhost = [smtpRelay]:port
mynetworks = "networks"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
#local_recipient_maps =

limite d'envoie message par connexion et par destinataire:

default_destination_recipient_limit = 100

#notification non sender delivery
notify_classes = resource, software, bounce
bounce_notice_recipient = mail.domain.com
error_notice_recipient = mail.domain.com

délais d'envois de la fil retardé

queue_run_delay = 30m
minimal_backoff_time = 15m
maximal_backoff_time = 60s

Délais notification non delivery

Authentincation

smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous,noplaintext
smtpd_sasl_path = smtpd
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes
#smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtpd_sasl_path = smtpd

queue_directory = /etc/postfix/queue
#command_directory = /opt/postfix/usr/sbin
#daemon_directory = /opt/postfix/usr/libexec/postfix
#data_directory = /opt/postfix/var/lib/postfix
mail_owner = postfix
#virtual_alias_maps = hash:/etc/postfix/virtual
smtp_generic_maps = hash:/etc/postfix/generic

#unknown_local_recipient_reject_code = 550
#inet_interfaces = all
#sendmail_path = /opt/postfix/usr/sbin/sendmail
#newaliases_path = /opt/postfix/usr/bin/newaliases
#mailq_path = /opt/postfix/usr/bin/mailq
setgid_group = postdrop
html_directory = no
#manpage_directory = /opt/postfix/usr/local/man
#sample_directory = /opt/postfix/etc/postfix
readme_directory = no
#inet_protocols = ipv4
postscreen_upstream_proxy_protocol = haproxy

it is only with ricoh copiers that I encounter this problem

where can it come from?

thank's for your help