谢谢您的回答。但是amavisd debug的输出并没有和SpamAssassin相关的内容。
[root@mail amavisd]# amavisd -c /etc/amavisd/amavisd.conf debug
Nov 6 14:31:56.756 localhost.localdomain /usr/sbin/amavisd[29365]: logging initialized, log level 5, syslog: amavis.mail
Nov 6 14:31:56.758 localhost.localdomain /usr/sbin/amavisd[29365]: run_command: [29366] /usr/bin/uptime </dev/null 2>/dev/null
Nov 6 14:31:56.762 localhost.localdomain /usr/sbin/amavisd[29365]: system uptime 16 20:50:00: 14:31:56 up 16 days, 20:50, 2 users, load average: 0.02, 0.01, 0.00
Nov 6 14:31:56.762 localhost.localdomain /usr/sbin/amavisd[29365]: Valid PID file (younger than sys uptime 16 20:50:00)
Nov 6 14:31:56.762 localhost.localdomain /usr/sbin/amavisd[29365]: The amavisd daemon is already running, PID: [28691]
The amavisd daemon is already running, PID: [28691]