Dns解析出的ip不通导致无法发送邮件

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1、Dns解析出的ip不通导致无法发送邮件I'可题：搬入公司新址，使用一运营商的专线网络后（原来使用电信宽带），经常有同事反馈有时无法发送邮件，有时能成功。今天有同事反馈无法发邮件，但他的账号在别人PC使用上是正常的，收发没有问题。Web页面模式登录邮箱，收发正常。排查过程:在自己的pc上测试发送邮件，并抓包。观察现象正常。公司使用其他公司的邮件服务器，抓包显示如下:接收过程:ME1・l*t丄・14U・丄U219.141.140.10丄•100•LJl•35192.168.207.535356623-^TT-11719

2、2.168.207.53219.141.140.10534955377219.141.140.10192.168.207.535353495134192.168.207.53211.150.82.86296699574211.150.82.8192.168.207.539956296670192.168.207.53211.150.82.86296699566192.168.207.53211.150.82.862966995391211.150.82.8192.168.207.539956296666211.150

3、.82.8192.168.207.53995629661514211.150.82.8192.168.207.53995629661514211.150.82.8192.168.207.5399562966191192.168.207.53211.150.82.86296699566192.168.207.53211.150.82.862966995384211.150.82.8192.168.207.5399562966117192.168.207.53211.150.82.86296699566211.150.8

4、2.8192.168.207.5399562966143192.168.207.53211.150.82.862966995121211.150.82.8192.168.207.5399562966111RtrHawwOarvn>itiinuirra-mrery-rifbpunbvuxuuohVN/wtttwtt..fwl-DNSStandardqueryresponse0xld8fCNAMEmm.263.netDNSStandardquery0xe463apop31TCP62966祁op3s[syn]TCPpop3

5、s-62966[SYN.TCP62966-pop3s[ack]SSLv2ClientHelloTCPpop3s-*62966[ack]LSv1.ServerHelloTCP[TCPsegmentofaLSvl・CertificateTCP62966-pop3s[ack]reassembledpou]握丰后进行收发过程Seq=326Ack=3O22win=260640LeLSvl.clientKeyExchange・ChangeCipherspec.EncryptLSvl.changecipherspec.Encryp

6、tedHandshakeMessageTCP62966-»pop3sLSvl・ApplicationLSvl・ApplicationLSv1.Application[ack]seq=644Ack=3O73win=260436LeDataDataData发送过程:Sr—sAW©gT«tachorvAc«»_£■.・BXeITag)13丨QQQ已l忆©务甘BfSt氐如心5用呦T&j219.141.140.10192.168.207.535353495134DNSstandardqueryresponse0xe463CN

7、AMEpop.263.ne192.168.207.5358.215.117.69629992574TCP62999-smtp[SYN]Seq=0win=8192Len=0MSS=1460w58.215.117.69192.168.207.53256299960TCPsmtp-62999[SYN.ack]Seq=0Ack=lw-n=14600Len=192.168.207.5358.215.117.69629992554TCP62999-♦smtp[ack]Seq=lAck=lwin=2仇080Len=058.215.

8、117.69192.168.207.53256299990SMTPS：220we1cometotapgatewayfor263192.168.207.5358.215.117.69629992576SMTPC：EHLO33FPNZVBDV9UQZ2dnsh*仃：58.215.117.69192.168.207.53256299960TCPsmt