sendmaiL每天需重启，请各位高手帮忙分析看看

fairyding

sendmail[779]: rejecting connections on daemon MTA: load average: 29
last message repeated 3 times
last message repeated 3 times
sendmail[18238]: grew WorkList for /var/spool/mqueue to 68000
rejecting connections on daemon MTA: load average: 30
last message repeated 3 times
last message repeated 3 times
sendmail[779]: rejecting connections on daemon MTA: load average: 29
这是日志里面截取的一部分，请各位高手帮忙分析一下如何解决，谢谢