I have gone through the forums and havent really found an answer to my problem. My situation is that i have several domain names. Some will want Zimbra and some might not. So my plan of approach was to leave my current qmail installation intact and forward all mail that needs to go to Zimbra. This will also allow me to have Zimbra behind a firewall and only part of my internal network. This part is partly working. I can see that from my qmail it is forwarded however it bounces back with the following message.

Hi. This is the qmail-send program at hide-out.net.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

xxx.xxx.xxx.xxx failed after I sent the message.
Remote host said: 554 too many hops, this message is looping (#5.4.6)

I most likely am overseeing something but at this point i dont see what goes wrong.

My second problem is that when i send email from Zimbra to a different domain that this doesn't arrive. I have left Zimbra to be the default MTA for everything so i believe that it should be able to relay to other domains?

I appreciate any feedback and thank all in advance that are willing to help me getting this to work.