高人解疑sasl

各位高人好
  我的postfix 已经配置好了sasl 收发信件正常, 但messages 总有错误,
  如: "unable to dlopen /usr/lib/sasl/libgssapiv2.so: ld.so.1: smtpd: fatal: relocation error: file /usr/lib/sasl/libgssapiv2.so: symbol GSS_C_NT_HOSTBASED_SERVICE: referenced symbol not found"
  请教这是怎么回事? 如何解决?谢谢.:w