I have working zimbra collaboration suite. I can receive mails from any domain (intranet, internet) after disabling dns lookup in admin -> Servers -> MTA.
But I cannot send mails to any domain. Is this a problem related to DNS entries ? In one of the threads I read the problem could be of reverse dns. If so how can resolve it ?
I checked nslookup x.x.x.x but got following error.
** server can't find x.x.x.x.in-addr.arpa: REFUSED
Thanks in advance.