MAIL SERVER NAME
This is the name with which the server present itself when it
communicates over the network.
From the figure you can see we have entered "YourDomainName".
Such a name may be used, but you should make it more informative
by choosing something like "post.inwebmail.com" where you have
included your domain name as the mail servers name (here inwebmail.com).
If the mail server name is not a domain name, you should instead
specify the IP-number on which the server operates.
SMTP and POP3 ports
The field "SMTP-port" is the port number at which the
mailserver is listening for new mails to arrive from
other mail servers. The port number is normally "25" and
should not be changed except under special conditions.
The field "POP3-port" is the port to which the users mail
client must connect in order to receive mails.
The port number is normally "110" and should not be changed
except under special conditions.
NS - Name Servers
You need to supply the IP-address
of the domain name server (DNS) you are going to use.
The DNS is used whenever a domain name is translated to
an IP-address. Ask your ISP for the IP-address. There is
an option for more than one DNS which would be useful in
case of malfunction of the first DNS.