Note that tcpd is a TCP wrapper. Before running exim it checks whether files hosts.allow and hosts.deny to see if the connection is from an authorised host. As a security precaution it should also be configured to only accept connections from machines within the Demon network. This means that tcpd will reject all connections that are not explicitly allowed by entries in hosts.allow. There are a range of mail clients that you can use to read mail once it has been received.
Popular text based mail clients include pine, elm and mutt.
I chose mutt, because pine and elm are not MIME aware. You are not restricted to text based clients there are also a number of graphical mail clients available. Downloading news There are a number of programs which will download news for you. These include suck, slrnpull and leafnode. I use the slrn newsreader, so I chose slrnpull to download news.