Can't contact LDAP Server

Hello,
I am starting to see this error on /var/log/univention/listener.log

16.08.16 09:47:06.513  LDAP        ( ERROR   ) : start_tls: Can't contact LDAP server
16.08.16 09:47:06.513  LISTENER    ( WARN    ) : can not connect to LDAP server mail.mydomain.com:7389

      This error is affecting my  email system deliveries  with the following error


Aug 16 10:00:06 mail postfix/pickup[7466]: 0EA638C0CF1: uid=0 from=<root>
Aug 16 10:00:15 mail postfix/smtpd[12860]: warning: dict_ldap_lookup: Search error -5: Timed out
Aug 16 10:00:15 mail postfix/smtpd[12860]: warning: ldap:/etc/postfix/ldap.ox-virtual lookup error for "user@mydomain.com"
Aug 16 10:00:15 mail postfix/smtpd[12860]: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 451 4.3.0 <user@mydomain.com>: Temporary lookup failure; 
       Please send me commands to check the integrity of the LDAP database aswell ,  to test connectivity  to it

thank you,

Rolando Riley

You can test the connectivity with

univention-ldapsearch cn=$(hostname)

You can restart the LDAP-daemon with

/etc/init.d/slapd restart
Mastodon