大量Postmaster notify: see transcript for details邮件

Sendmail邮件系统。root用户受到大量Subject为Postmaster notify: see transcript for details的邮件

解决方案：

1. Add host.server.com to /etc/mail/local-host-names
2. Send the Sendmail daemon a SIGHUP signal (ex. kill -HUP `head -1 /var/run/sendmail.pid`)