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发表于 2005-8-6 19:31:04
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发信的时候,会去查DNS里面的MX记录。比如: blazin@sina.com.cn
- blazin@ubuntu:~$ dig sina.com.cn in MX
- ; <<>> DiG 9.2.4 <<>> sina.com.cn in MX
- ;; global options: printcmd
- ;; Got answer:
- ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62290
- ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 6
- ;; QUESTION SECTION:
- ;sina.com.cn. IN MX
- ;; ANSWER SECTION:
- sina.com.cn. 595 IN MX 10 sinamx.sina.com.cn.
- ;; AUTHORITY SECTION:
- sina.com.cn. 86395 IN NS ns1.sina.com.cn.
- sina.com.cn. 86395 IN NS ns2.sina.com.cn.
- sina.com.cn. 86395 IN NS ns3.sina.com.cn.
- ;; ADDITIONAL SECTION:
- sinamx.sina.com.cn. 55 IN A 202.108.3.186
- sinamx.sina.com.cn. 55 IN A 202.108.3.187
- sinamx.sina.com.cn. 55 IN A 202.108.3.188
- ns1.sina.com.cn. 43195 IN A 202.106.184.166
- ns2.sina.com.cn. 43195 IN A 61.172.201.254
- ns3.sina.com.cn. 43195 IN A 202.108.44.55
- ;; Query time: 45 msec
- ;; SERVER: 127.0.0.1#53(127.0.0.1)
- ;; WHEN: Sat Aug 6 19:26:49 2005
- ;; MSG SIZE rcvd: 202
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