We installed untangle on our network a few days ago. It is replacing our sonicwall.
We installed the firewall add on as well and set the default action to block.
Our email server is on the DMZ. We opened port 25 to only receive mail from our LAN and our school.
We receive mail really fast. When we send mail it takes about 30 seconds to send.
Why does it take so long to send out email?