Zimbra nginx listen http
login as zimbra user
su - zimbra
change proxy mode
zmprov ms YOUR.DOMAIN.HERE zimbraReverseProxyMailMode redirect
restart zimbra proxy
zmproxyctl restart
check - if now listen 80 port
lsof -i tcp:80
login as zimbra user
su - zimbra
change proxy mode
zmprov ms YOUR.DOMAIN.HERE zimbraReverseProxyMailMode redirect
restart zimbra proxy
zmproxyctl restart
check - if now listen 80 port
lsof -i tcp:80