[exim] Exim 4.7.1 problem

Hello, in a server use Fedora 4 (too old je) with exim 4.7.1.


In exim i connect to a spamassassin remote server with a hostname, but a recieved an error:


spam acl condition: warning - spamd connection to spamassassin.blabla, port 783 failed: Network is unreachable


But i try to connect to the IP the connection is work.


This error is a bug from the exim version?


Regards,