Hi,
Here an extract of the debug logs :
Mar 3 17:11:21 srv-mbx-01p dovecot: auth: Debug: client in: CONT#0111#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 (previous base64 data may contain sensitive data)
Mar 3 17:11:21 srv-mbx-01p dovecot: auth: Debug: ldap(user@domain.net,127.0.0.1,<0FbAjfWf/Lp/AAAB>): bind search: base=ou=Bordeaux,dc=c000109,dc=intra filter=(&(mail=user@domain.net)(objectClass=inetOrgPerson))
Mar 3 17:11:21 srv-mbx-01p dovecot: auth: Debug: ldap(user@domain.net,127.0.0.1,<0FbAjfWf/Lp/AAAB>): result: objectClass=posixAccount,posixAccount,posixAccount givenName=user sn=TEST displayName=user TEST homeDirectory=/home/rTEST uidNumber=33408 gidNumber=24066 uid=r.TEST userPassword={SSHA}n+3lAlYYESxWpg0nVZyvl6DXcYd09KjH mail=user@domain.net cn=user@domain.net jpegPhoto=<no values>; homeDirectory,uidNumber,objectClass,cn,givenName,uid,mail,jpegPhoto,gidNumber,displayName,userPassword,sn unused
Mar 3 17:11:21 srv-mbx-01p dovecot: auth: Debug: ldap(user@domain.net,127.0.0.1,<0FbAjfWf/Lp/AAAB>): result: objectClass=posixAccount,posixAccount,posixAccount givenName=user sn=TEST displayName=user TEST homeDirectory=/home/rTEST uidNumber=33408 gidNumber=24066 uid=r.TEST userPassword={SSHA}n+3lAlYYESxWpg0nVZyvl6DXcYd09KjH mail=user@domain.net cn=user@domain.net jpegPhoto=<no values>; homeDirectory,uidNumber,objectClass,cn,givenName,uid,mail,jpegPhoto,gidNumber,displayName,userPassword,sn unused
Mar 3 17:11:21 srv-mbx-01p dovecot: auth: ldap(user@domain.net,127.0.0.1,<0FbAjfWf/Lp/AAAB>): invalid credentials (given password: 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)
Mar 3 17:11:23 srv-mbx-01p dovecot: auth: Debug: client passdb out: FAIL#0111#011user=user@domain.net
Maybe it's using LDAP because Before, I was using LDAP authentication. Maybe I have to change dovecot-ldap.conf
Here my /etd/pam.d/dovecot conf :
#%PAM-1.0
auth required pam_scrript.so grace=900 dir=/etc userid=mail idp=/etc/sogo/idp-metadata.xml trusted_sp=https://webmail.*****/SOGo/saml2-metadata
account required pam_permit.so
session required pam_permit.so