Have you tried it with the -E switch?
The only way I can reproduce the return code, 98, is if I pass spamc a valid, running, spamd host and give it /dev/null as input. Passing it a bad hostname results, expectedly, in 68.
spamc -E -t 60 -d valid.spamd.server < /dev/null
Why you would try to do that, I don't know.
Daryl
