I created a Zimbra mail server on VM Ubuntu 16.04 with Virtualbox. Now I want to configure the Zimbra server to catch all incoming emails by another application.
I configured the VM Ubuntu 16.04
```
VirtualBox
Ubuntu 16.04
IP: 192.168.0.200
Default Route: 192.168.0.1
Primary DNS: 192.168.0.1
```
I installed dnsmasq in the VM Ubuntu 16.04 with configuration:
```
/etc/dnsmasq.conf:
server=192.168.0.200
listen-address=192.168.0.200
listen-address=127.0.0.1
domain=alex.local
mx-host=alex.local,mail.alex.local,0
address=/mail.alex.local/192.168.0.200
```
And in my Ubuntu 20.04, I configure:
```
IP: 192.168.0.100
Defalt Route: 192.168.0.1
DNS: 192.168.0.200, 192.168.0.1
```
Now I want to create an app, which can catch all incoming emails to Zimbra (for future filter spam email purpose)