User manual

Chapter 5: Server Management
138 Cobalt RaQ XTR User Manual
For the RaQ XTR to receive email, you or your network administrator must enter
a mail server host name in your organization’s DNS server to designate the
RaQ XTR as the mail server for a domain. Email service depends on DNS, so the
IP address of a DNS server must be entered in the network settings for the
RaQ XTR; if not, the SMTP protocol will not work. For more information, see
“Network” on page 145.
For more information on DNS, see “Domain Name System (DNS) server” on
page 145.
POP-before-SMTP feature
The RaQ XTR provides an option that allows POP authentication before SMTP.
To enable this feature, see “Configuring the email parameters” on page 139.
Normally, you only permit email relaying from within your own network. But
some users travel and connect from other places (for example, sales people or
field engineers) and you want to let those users relay email through your server.
The way to allow this and still protect your RaQ XTR from being used to relay
spam mail is to authenticate the user through POP before allowing an SMTP
connection for that user’s IP address.
When a user logs in for POP3 email, the RaQ XTR notes the IP address from
which the connection was made and permits relays from that IP address for a
limited time. Travelling users need only check their email to “unlock” the mail
server; no changes to the client mail software are necessary.
The POP-before-SMTP implementation causes SMTP access for the IP address
to expire after one hour.
Figure 62 shows the “Email Parameters” table.
Figure 62. Email Parameters table