有人遇到过无法从 Rackspace 服务器连接到 email-smtp.us-east-1.amazonaws.com 进行 SMTP 的问题吗？当我从 Rackspace 服务器 ping 时，数据包总是 100% 丢失。所以我运行了跟踪路由，结果如下。
[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 * * *
有人遇到过这个问题并知道如何解决吗？
答案1
看起来好像 ICMP 在 SES 服务器上被阻止了，所以无论你从哪里执行 ping 和跟踪路由都不起作用。但是，我使用 Rackspace Cloud Server 测试连接到你提供的主机上的 SMTP 时，一切正常：
$ 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