I'm new with Zimbra and have setup the open source version on an Ubuntu LTS 12.4 VM. The install was completed and I was able to create a user and connect to the mail server using Outlook 2010. Email sending and receiving is ok within the doman but my email client cannot either send or receive email to and from the internet (gmail or other private networks/domains). Can somebody please help me on resolving the issue please.
Thank you in advance.