Dns marcmac, thank you for your valued attention. I have checked DNS as follows:
zimbra:~ zimbra$ host localhost
localhost has address 127.0.0.1
zimbra:~ zimbra$ host 127.0.0.1
1.0.0.127.in-addr.arpa domain name pointer localhost.
zimbra:~ zimbra$ host zimbra.mkk-hamburg.de
zimbra.mkk-hamburg.de has address 192.168.1.240
zimbra:~ zimbra$ host 192.168.1.240
240.1.168.192.in-addr.arpa domain name pointer zimbra.mkk-hamburg.de.
To me, it looks as if everything is being looked up and resolved correctly.
As for the port 389, no, I can't telnet to that port. I tried starting ldap manually as advised by KevinH but to no avail. slapd is not running, I can't see it anywhere in the process list at any time after the zimbra startup command or the slapd start command.I ceartainly did a lot of searches and read every possibly related post in this forum. Other posters with similar troubles concerning this error all seem to be Linux users. Therefore I doubt that editing /etc/hosts will solve this.
Thanks again for your support.
playersons |