I am in the midst of migrating to Zimbra. I am having some issues with a relay configuration.
On the client website there are some webforms which should be relayed through Zimbra.
So far I have allowed the webserver (i.e x.x.x.x/32) as an external remote network on MtaMyNetworks. I assumed this would be enough, and executed postfix reload.
Unfortunately the relay is still not working. I believe I may need to setup some sort of authentication? How would I do this? I know the username that the webforms use to authenticate.
Thanks for your help, I really appreciate it as I am getting pretty desperate.