有没有人遇到一个问题，他们无法连接到来自Rackspace服务器SMTP的email-smtp.us-east-1.amazonaws.com？ 当我从机架空间服务器ping时，总是有100％的数据包丢失。 所以我跑了一条跟踪路线，这是结果。
[root@job-server-1 ~]# traceroute email-smtp.us-east-1.amazonaws.com traceroute to email-smtp.us-east-1.amazonaws.com (xx.xxx.47.187), 30 hops max, 60 byte packets 1 162.209.11.2 (162.209.11.2) 3.710 ms 3.781 ms 3.752 ms 2 core5-aggr1501a-4.ord1.rackspace.net (50.56.6.56) 4.681 ms 4.627 ms 4.604 ms 3 50.56.6.130 (50.56.6.130) 4.544 ms 4.528 ms 50.56.6.128 (50.56.6.128) 4.506 ms 4 edge3.ord1.rackspace.net (184.106.126.141) 5.273 ms edge3.ord1.rackspace.net (184.106.126.143) 5.236 ms edge3.ord1.rackspace.net (184.106.126.141) 5.208 ms 5 xe-3-2-0.er1.ord7.us.above.net (64.124.65.217) 5.184 ms 5.159 ms 5.129 ms 6 xe-2-2-0.cr1.ord2.us.above.net (64.125.26.249) 6.643 ms 2.015 ms 4.399 ms 7 xe-5-0-0.cr1.lga5.us.above.net (64.125.31.238) 24.311 ms 24.274 ms 24.268 ms 8 xe-3-2-0.cr1.dca2.us.above.net (64.125.26.101) 26.449 ms 26.422 ms 26.408 ms 9 xe-3-2-0.er1.iad10.us.above.net (64.125.29.209) 26.384 ms 26.352 ms 26.335 ms 10 xe-1-0-0.er5.iad10.us.above.net (64.125.24.133) 25.768 ms 25.742 ms 25.707 ms 11 above-amazon.iad10.us.above.net (64.125.12.30) 29.229 ms 28.451 ms 28.405 ms 12 72.21.220.63 (72.21.220.63) 29.107 ms 28.792 ms 28.756 ms 13 72.21.222.155 (72.21.222.155) 29.143 ms 30.465 ms 30.441 ms 14 * * * 15 * * * 16 * * * 17 216.182.224.229 (216.182.224.229) 24.664 ms 24.610 ms 216.182.224.91 (216.182.224.91) 23.864 ms 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * * 有没有人有过这个问题，知道如何解决它？
看起来好像ICMP在SES服务器上被阻塞了，所以ping和traceroute将不会工作，不pipe你从哪里做。 但是，我的testing连接到您提供的主机上的SMTP工作正常从Rackspace云服务器：
$ echo quit | nc -v email-smtp.us-east-1.amazonaws.com 25 Connection to email-smtp.us-east-1.amazonaws.com 25 port [tcp/smtp] succeeded! 220 email-smtp.amazonaws.com ESMTP SimpleEmailService-376766033