SMTP - authentication failure - (one more time...)

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Hi djez,

Thank you very much for your help. You analyze is fine and gives hope

Here are the results of the commands

  1. for

result:

● slapd.service - LSB: OpenLDAP standalone server (Lightweight Directory Access Protocol)
Loaded: loaded (/etc/init.d/slapd; generated)
Drop-In: /usr/lib/systemd/system/slapd.service.d
└─slapd-remain-after-exit.conf
/etc/systemd/system/slapd.service.d
└─ynh-override.conf
Active: active (running) since Tue 2026-01-20 22:29:37 GMT; 34min ago
Docs: man:systemd-sysv-generator(8)
Process: 28028 ExecStart=/etc/init.d/slapd start (code=exited, status=0/SUCCESS)
Tasks: 6 (limit: 1569)
CPU: 4min 5.581s
CGroup: /system.slice/slapd.service
└─28037 /usr/sbin/slapd -h “ldap://localhost:389/ ldaps:/// ldapi:///” -g openldap -u openldap -F /etc/ldap/slapd.d

for

see here https://paste.yunohost.org/raw/ibovavemid

  • for

$ free -h
total used free shared buff/cache available
Mem: 921Mi 401Mi 53Mi 25Mi 562Mi 519Mi
Swap: 511Mi 243Mi 268Mi
$ uptime
23:08:35 up 6 days, 2:07, 2 users, load average: 0.13, 0.19, 0.19

for

Still fails. See here: https://paste.yunohost.org/raw/owepodokeg

  • Dovecot needs 12 s for imap LDAP request (seen in another log file)
  • And you are right, request of POSTFIX fails before the end of LDAP request

Your questions:

  • i recently rebooted it

  • it degraded suddenly last week, when i de-installed LUFI. But i already had the same kind of problem, due to memory and number of threads, solved by changing some request parameters in nlscd.conf : see Impossible to connect to SSH or to SMTP

  • RAM available: 53Mi Mem, 268 Mi RAM