咨询一个sendmail和邮件列表的问题

loonux

我最近在公司服务器上使用mailman搭建了一个邮件列表，邮件服务器是sendmail，前段时间没有问题，但这几天新建了一个150人的列表后就不能正常工作了。由于公司大部分是139邮箱的，大约100多人。最近发现除了139邮箱，其它的比如163，qq邮箱都可以正常收信。查看log发现类似如下错误

s7LH7A7T014947: to=<wenjuncui@139.com>, delay=00:33:11, xdelay=00:00:01, mailer=esmtp, pri=4410473, relay=mx1.mail.139.com. [221.176.9.178], dsn=4.2.0, stat=Deferred: 450 2eed53f6b08b99e-a61de Requested mail action not taken: too much recipient limit
s7LH7A7T014947: to=<wulianghu5@139.com>, delay=00:33:11, xdelay=00:00:01, mailer=esmtp, pri=4410473, relay=mx1.mail.139.com. [221.176.9.178], dsn=4.3.1, stat=Deferred: 452 2eed53f6b08b99e-a61de RCPT command count exceed limit
s7LH7A7T014947: to=<wumengyu77@139.com>, delay=00:33:11, xdelay=00:00:01, mailer=esmtp, pri=4410473, relay=mx1.mail.139.com. [221.176.9.178], dsn=4.3.1, stat=Deferred: 452 2eed53f6b08b99e-a61de RCPT command count exceed limit
s7LH7A7T014947: to=<wuwenhao_sz@139.com>, delay=00:33:11, xdelay=00:00:01, mailer=esmtp, pri=4410473, relay=mx1.mail.139.com. [221.176.9.178], dsn=4.3.1, stat=Deferred: 452 2eed53f6b08b99e-a61de RCPT command count exceed limit



s7LH7A7T014947: to=<wenjuncui@139.com>,<wulianghu5@139.com>, delay=00:33:13, xdelay=00:00:03, mailer=esmtp, pri=4410473, relay=mx3.mail.139.com. [221.176.9.178], dsn=4.0.0, stat=Deferred: 450 2ee753f6b08c56f-c8247 Mail rejected, please try again



请问大牛那里的配置有问题？是否是因为群发人数超过上限引起的？