Issue problem installing ldap

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Server operating system version

Ubuntu 18.04.6 LTS

Plesk version and microupdate number

Versión 18.0.47 Actualización 5

Hello:
I'm trying to install ldap on my ubuntu server with plesk running to be able to query existing emails from my proxmox mail gateway using ldap but I get the following problem when starting it:

Can't read encryption key from '/var/spool/postfix/plesk/passwd_db_key': Permission denied (13)
Failed to initialize encryption cipher 'AES-256-CBCKCS' with key '/var/spool/postfix/plesk/passwd_db_key'
Failed to initialize password cipher context
auxpropfunc error no mechanism available
_sasl_plugin_load failed on sasl_auxprop_plug_init
slapd starting
...done.
Started LSB: OpenLDAP standalone server (Lightweight Directory Access Protocol).

The permissions of said file are the following, I understand that they are correct:

-r--r----- 1 postfix root 32 Dec 6 12:22 /var/spool/postfix/plesk/passwd_db_key

When it does not start, it does not allow me to create organizational units or anything, it always tells me:

ldap_bind: Invalid credentials (49)

Could someone tell me how to fix this?
Thank you

 

[IgorG]

I would suggest you check SELinux status with

# getenforce

 

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I would suggest you check SELinux status with

# getenforce

Hello:
I have installed the selinux-utils package since I did not have it installed and when I run getenforce it tells me disabled
how should i proceed?
Thank you

 

[Peter Debik]

In order to read the file, an application must either be postfix or have root privileges. Your error message says that you are running a standalone server. Under which user account is the server starting?

 

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In order to read the file, an application must either be postfix or have root privileges. Your error message says that you are running a standalone server. Under which user account is the server starting?

hello
I have added the user openldap to the postfix group and restarted both services but it still gives me the same error
what else should i do?
Thank you