I think I have this resolved for now. I was able to revert the mailstore back to the old domain name and everything is working.

This is from the mailbox.log file:

SoapEngine - handler exception
com.zimbra.common.service.ServiceException: error while proxying request to target server no such server:...

Is this a possible proxy issue? I've never turned on proxy before.

I changed the domain name of my servers in a multi-server install and now I can't seem to get into the web interface. I get a login screen but after I log in I get nothing. Swift assistance would be...

I would suggest you do a multi-server install setting up the MTA on your "backup" server. Just run the install script on the backup server, just install the MTA portion nothing else.

Over the last couple of months I've been having an issue with one of my LDAP servers. A few times a week the LDAP service crashes, the mail system carries on because my backup server picks...

In the admin console you can setup the domain to do external authentication, its very easy just follow the wizard.

I figured it out. My keystore still had the tomcat entry in it and will preferring it. I may be advantageous to remove the keystore in the upgrade.

I have five servers:
2 LDAP servers
2 MTA servers
1 Mailbox server

All running version 5.0.1.

I have been running self-signed certs for over a year, and I am now install commercial certs. I...

This is most likely because your users are in the zimbraMTAMyNetworks. Whoever sits in those subnets are considered trusted and do not have to authenticate.

You'll need to use a mailing list application such as mailman.

http://www.zimbra.com/forums/administrators/1380-solved-zimbra-mailman-howto.html

Use distribution lists.

Yes do the install normally with the local OpenLDAP server then when that is complete you can use the admin console to change the authentication method to use an external LDAP service.

On your main LDAP server use

zmlocalconfig -s | grep pass

It will show you all of the configured passwords.

The installer should repair the tables automatically, but if you want good measure stop after this step and rerun the installer and it will check again, it shouldn't come back with any errors this...

Have a look at this:

http://www.zimbra.com/forums/administrators/1380-solved-zimbra-mailman-howto.html

It seems that link to download the ZME client is no longer working. Is this because of the data centre move?

Thanks

In my opinion you should always firewall. I have firewalled everything with proper permissions it will still work properly.

Your MTA should be in a DMZ because it is fairly public.

The easiest way to do this is have your script periodically check a mail box for message then parse those messages with the script

If you do a execute "postfix reload" is should pull all the new parameters, and it's non-intrusive.

zmprov ds <servername>

There is no Clustering available for the OSS only for the NE on RHEL.

I depends on what you plan to deploy if you are using the open source solution or the network edition are you planning using only the web interface or are people going to be on POP and IMAP, if you...

You'll need to turn it off, and then disable it from startup.

Something like
/etc/init.d/exim stop
or
/etc/init.d/exim4 stop

Then to disable it at startup use chkconfig

POP can't do this POP can only see the Inbox, if you want to see the Junk folder you are going to have to use IMAP