I was running traceroute as root.
On 2/11/25 13:37, Jim Garrison via Postfix-users wrote:
On 2/11/2025 09:43, John Griffiths via Postfix-users wrote:
I am trying to determine whether it is a routing issue or my IP or
domain have been blacklisted.
Running traceroute the problem appears to be at
ex9k1.dc6.hel1.hetzner.com (213.239.252.198) which is in Germany.
traceroute can be deceiving since without root access it uses UDP
probes, which can get blocked many places.
Here's a data point - traceroute (sudo mtr, using ICMP) from Comcast
(Portland, OR):
IPv6
...
17. ex9k1.dc6.hel1.hetzner.com
18. ra.horus-it.com
IPv4
...
10. ex9k1.dc6.hel1.hetzner.com
11. ra.horus-it.com
And "sudo traceroute -I 65.108.3.114" (using ICMP, times removed to
avoid linebreaks)
$ sudo traceroute -I 65.108.3.114
traceroute to 65.108.3.114 (65.108.3.114), 30 hops max, 60 byte packets
1 janus.jhmg.pvt (192.168.10.254)
2 100.93.174.3 (100.93.174.3)
3 po-332-364-rur202.beaverton.or.bverton.comcast.net (96.108.64.189)
4 po-200-xar02.beaverton.or.bverton.comcast.net (96.216.60.165)
5 ae-69-ar01.troutdale.or.bverton.comcast.net (68.85.243.197)
6 ae5.bar4.por1.sp.lumen.tech (4.68.37.245)
7 ae2.2.edge1.hel1.neo.colt.net (171.75.10.35)
8 212.133.6.2 (212.133.6.2)
9 core32.hel1.hetzner.com (213.239.224.26)
10 ex9k1.dc6.hel1.hetzner.com (213.239.252.198)
11 ra.horus-it.com (65.108.3.114) 181.064 ms * *
So if you can ICMP ping successfully, then a blacklist, if one exists
would be on the Postfix web server itself.
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