Error creating a DNS resolver socket

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 warn: Error creating a DNS resolver socket: No such file or directory
+ at /opt/lib/perl5/site_perl/5.8.8/Mail/SpamAssassin/DnsResolver.pm l
+ine 203

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  my $port_offset = int(rand(64511));  # 65535 - 1024
  for (my $i = 0; $i<64511; $i++) {
...
    warn "Can't create a DNS resolver socket: $errno";
    goto no_sock;
  }

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;; RESOLVER state:
;;  domain       =
...
;;  usevc    = 0  stayopen = 0    igntc = 0
;;  defnames = 1  dnsrch   = 1
;;  recurse  = 1  debug    = 0

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