为何linux系统/var/spool/postfix/maildrop目录有大量文件，占据大量系统磁盘空间分析以及处理
Most of the mails in /var/spool/postfix/maildrop directory are system generated. Hence even though postfix is disabled or stopped you may have thousands of mails in it. Most of the mails (99%) are generated due to crontab. When any job is executed and the jobs cannot run normally it will send an email to root. You can set MAILTO=”” variable at the start of your crontab file. This will also disable email alert. Edit/Open your cron jobs: $ crontab -e At the top of the file, enter: MAILTO=""
下面是删除/var/spool/postfix/maildrop/空间实测代码：
[root@iZ25ja2kaemZ ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/vda1 20G 19G 570M 98% /
tmpfs 499M 0 499M 0% /dev/shm
/dev/vdb1 20G 8.9G 9.9G 48% /newdata
[root@iZ25ja2kaemZ ~]# rm -f /var/spool/postfix/maildrop/ #有时候文件太多一次性删除会报错，可以分批 rm -f /var/spool/postfix/maildrop/1*,rm -f /var/spool/postfix/maildrop/2*，以及../A*,...../B*等
[root@iZ25ja2kaemZ maildrop]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/vda1 20G 5.7G 14G 31% /
tmpfs 499M 0 499M 0% /dev/shm
/dev/vdb1 20G 8.9G 9.9G 48% /newdata
