Amavisd从8.0.x 升级到高版本（8.5.x，8.6.x，8.7.x）不能启动

如题，amavisd 不能正常启动并且 zimbra.log日志报错：

Not able to start Amavis services, error : 
Dec 21 10:02:29 server amavis[7787]: initializing Mail::SpamAssassin (0) 
Dec 21 10:02:29 server amavis[7787]: (!!)TROUBLE in pre_loop_hook: config: no rules were found! Do you need to run 'sa-update'? 
Dec 21 10:02:29 server amavis[7787]: (!)_DIE: Suicide () TROUBLE in pre_loop_hook: config: no rules were found! Do you need to run 'sa-update'?

解决办法：
服务器接入外网，然后运行 sa-update 即可解决此问题：

su – zimbra  
/opt/zimbra/zimbramon/bin/sa-update -D  
zmamavisdctl restart 

如果 ZCS 服务器没有外网：

• 检查 "/opt/zimbra/data/spamassassin/" 目录的 "state"目录
• 如果 "state" 目录存在，将它移到别的地方并重启 Amavisd 服务：

mv /opt/zimbra/data/spamassassin/state /tmp/state  
zmamavisdctl restart