<![CDATA[My OVH dedicated server is blacklist by SpamHaus]]>Hello,

It seems several people encounter this issue.

Can you help ?

Thanks!
Laurent Michel

]]>https://forum.cloudron.io/topic/10659/my-ovh-dedicated-server-is-blacklist-by-spamhausRSS for NodeTue, 11 Aug 2026 20:19:02 GMTFri, 15 Dec 2023 14:57:31 GMT60<![CDATA[Reply to My OVH dedicated server is blacklist by SpamHaus on Wed, 24 Apr 2024 06:18:35 GMT]]>@gerard thanks for testing. A fix for this is coming next release.

The issue is fairly recent. SpamHaus made some policy change when requests come from IPv6 addresses.

]]>https://forum.cloudron.io/post/87370https://forum.cloudron.io/post/87370Wed, 24 Apr 2024 06:18:35 GMT<![CDATA[Reply to My OVH dedicated server is blacklist by SpamHaus on Tue, 23 Apr 2024 18:57:55 GMT]]>@girish That's it! SpamHaus check is now green.

]]>https://forum.cloudron.io/post/87361https://forum.cloudron.io/post/87361Tue, 23 Apr 2024 18:57:55 GMT<![CDATA[Reply to My OVH dedicated server is blacklist by SpamHaus on Tue, 23 Apr 2024 15:38:16 GMT]]>I think this is because recently SpamHaus added a policy to not allow requests from many IPv6 blocks. Can you please check this:

  • SSH into server and edit /etc/unbound/unbound.conf.d/cloudron-network.conf . Change the line do-ip6: yes to do-ip6: no .
  • systemctl restart unbound

Does this help the SpamHaus check?

]]>https://forum.cloudron.io/post/87347https://forum.cloudron.io/post/87347Tue, 23 Apr 2024 15:38:16 GMT<![CDATA[Reply to My OVH dedicated server is blacklist by SpamHaus on Tue, 23 Apr 2024 15:07:23 GMT]]>Same issue here. Cloudron says it's blacklisted by Spamhaus, but Spamhaus itself says it's not.

]]>https://forum.cloudron.io/post/87344https://forum.cloudron.io/post/87344Tue, 23 Apr 2024 15:07:23 GMT<![CDATA[Reply to My OVH dedicated server is blacklist by SpamHaus on Mon, 22 Apr 2024 20:40:38 GMT]]>Yes, I do have IPv6 enabled. But Cloudron displays that the IPv4 is blocklisted:
"This server's IP 149.202.72.125 is on a blocklist"
"SpamHaus Zen"
When checking this IPv4 with the previoiusly described services, it doesn't show up as blocked.

]]>https://forum.cloudron.io/post/87297https://forum.cloudron.io/post/87297Mon, 22 Apr 2024 20:40:38 GMT<![CDATA[Reply to My OVH dedicated server is blacklist by SpamHaus on Sun, 21 Apr 2024 14:43:20 GMT]]>@gerard sometimes the outbound used is an IPv6 and not IPv4. Do you have IPv6 enabled on your server?

(There is an internal task to fix this on Cloudron side. It should display what is causing the error IPv4 or the IPv6 resolution).

]]>https://forum.cloudron.io/post/87232https://forum.cloudron.io/post/87232Sun, 21 Apr 2024 14:43:20 GMT<![CDATA[Reply to My OVH dedicated server is blacklist by SpamHaus on Sat, 20 Apr 2024 08:48:38 GMT]]>Hello, are you sure that your the Cloudron blocklist check works well and that the IP address DB is up to date ?
I'm experiencing the same issue than @laurent with an OVH dedicated server. Cloudron tells me that my server's IP address is on the Spamhaus ZEN block list.

  • I tested my IP address directly on check.spamhaus.org: IP address "has no issues" !
  • Then I tested it with mxtools: Green checkmark for Spamhaus ZEN !
  • Then, again using mail-tester.com: Not listed on any Spamhaus blocklist

(although, mail-tester does not seem to use the ZEN list but shows 4 other Spamhaus list names)

So why does Cloudron tells me that it's on the ZEN blocklist ? Very strange.

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]]>https://forum.cloudron.io/post/87194https://forum.cloudron.io/post/87194Sat, 20 Apr 2024 08:48:38 GMT<![CDATA[Reply to My OVH dedicated server is blacklist by SpamHaus on Fri, 15 Dec 2023 15:50:28 GMT]]>Yes, this is quite common. You have to setup a mail relay if you care about mail deliverability - https://docs.cloudron.io/email/#relay-outbound-mails

]]>https://forum.cloudron.io/post/79461https://forum.cloudron.io/post/79461Fri, 15 Dec 2023 15:50:28 GMT