Juniper

what is this cli response "&&"

from the CLI of a juniper firewall, when I ping an IP address, I get this response "&&". what does this mean?

Accessing email server behind firewall

I have an email Microsoft exchange mail server running on our LAN, it takes emails form various ISPs and sends then to outlook users on the LAN via juniper firewall, i have a mac pc and i want to configure mac Mail with exchange server, i was able to get mails but fail to send emails. please help...