free Interrnet provider for Linux and exim

[Dan Pomohaci <danp@worldshare.net>]

Thanks everybody (and especially Tim Anderson) who helped me to find
an free Internet provider for Linux. I succeeded to connect to
worldshare.net.
Now I have an other question. How can I use their outgoing server
(smtp.worldshare.net) for relaying my email. In exim.conf I put:
smarthost:
  driver = domainlist
  transport = remote_smtp
  route_list = "* smtp.worldshare.net bydns_a"
but it isn't enough because I received the error message:
    553 To send mail, first check your mail with a valid POP account;
this prevents  unauthorized SPAM relaying. (#5.7.1)

Dan Pomohaci