帮忙看看啊。发送时过长
在发送时，连接时，发送开始时都有等待
日志如下：
[root@cp_test root]# tcpdump host 132.147.165.169
tcpdump: listening on eth0
11:55:53.694897 132.147.165.169.1045 > cp_test.lkm.com.smtp: S 4180890119:4180890119(
0) win 65535 (DF)
11:55:53.694936 cp_test.lkm.com.smtp > 132.147.165.169.1045: S 3541943358:3541943358(
0) ack 4180890120 win 5840 (DF)
11:55:53.695043 132.147.165.169.1045 > cp_test.lkm.com.smtp: . ack 1 win 65535 (DF)
11:56:13.730708 cp_test.lkm.com.smtp > 132.147.165.169.1045: P 1:85(84) ack 1 win 584
0 (DF)
11:56:13.731237 132.147.165.169.1045 > cp_test.lkm.com.smtp: P 1:14(13) ack 85 win 65
451 (DF)
11:56:13.731259 cp_test.lkm.com.smtp > 132.147.165.169.1045: . ack 14 win 5840 (DF)
11:56:13.731336 cp_test.lkm.com.smtp > 132.147.165.169.1045: P 85:305(220) ack 14 win
5840 (DF)
11:56:13.734358 132.147.165.169.1045 > cp_test.lkm.com.smtp: P 14:57(43) ack 305 win
65231 (DF)
11:56:13.768621 cp_test.lkm.com.smtp > 132.147.165.169.1045: . ack 57 win 5840 (DF)
11:56:33.769640 cp_test.lkm.com.smtp > 132.147.165.169.1045: P 305:360(55) ack 57 win
5840 (DF)
11:56:33.770152 132.147.165.169.1045 > cp_test.lkm.com.smtp: P 57:98(41) ack 360 win
