CentOS邮件服务器（如Postfix、Sendmail）的日志默认存放在/var/log/maillog。
tail -f /var/log/mailloggrep "status=sent" /var/log/maillog（查看发送成功的邮件）grep -o 'postfix/smtp.*to=<[^>]*>' /var/log/maillog | wc -l（统计发送邮件数）grep -o 'from=<[^>]*>' /var/log/maillog | awk -F'[<>]' '{print $4}' | sort | uniq -c | sort -nryum install logwatchlogwatch --output mail --range 'yesterday'grep "status=bounced" /var/log/mailloggrep "authentication failure" /var/log/mailloggrep "Oct 10 14:" /var/log/mailloglogrotate工具自动压缩旧日志，避免占用磁盘空间。
