If you've removed zimbra and this happens:
Then there is a web server listening on that port.
tcp 0 0 :::80 :::* LISTEN
tcp 0 0 :::22 :::* LISTEN
tcp 0 0 :::443 :::* LISTEN
also means that something is listening on that port but it can't make a connection. That could be a firewall or SElinux, for instance. Have you had a look at your package installation and seen if Apache is installed? Have you also checked to see if it's running? You could try 'lsof -l | grep apache'
[root@zmail ~]# telnet zmail.no-ip.info 443
Connected to zmail.no-ip.info (xx.xx.xx.xx).
Escape character is '^]'.
Connection closed by foreign host.