I have searched the documentation and have found no way to, for example, configure my gmail account on the zimbra web interface and send as firstname.lastname@example.org.
I can receive emails without a problem, I just can't reply to them as from a gmail.com domain.
I guess there is a good reason for this, and I suspect it's a security reason. So could someone explain to me why?
Thanks for any help or pointer to documentation. ;)