Haraka Mailserver Logs show loopback_is_rejected errors

[Kubernetes]

Hi there,

today I discovered, that I get (maybe every 30 Minutes?) the following errors:

2024-12-29T04:11:07Z TypeError: Cannot read properties of undefined (reading 'loopback_is_rejected')
2024-12-29T04:11:07Z at exports.checkZoneNegative (/app/code/haraka/node_modules/haraka-plugin-dns-list/index.js:347:22)
2024-12-29T04:11:07Z at exports.check_zone (/app/code/haraka/node_modules/haraka-plugin-dns-list/index.js:372:20)
2024-12-29T04:11:07Z at async Promise.all (index 1)
2024-12-29T04:11:07Z at async exports.check_zones (/app/code/haraka/node_modules/haraka-plugin-dns-list/index.js:393:5)

Is this something we should be concerned?

Best,
Mike

[robi]

That may be related to the issues others are seeing while attempting to send mail while VPNd in. Loopback being rejected for local connections?

[Kubernetes]

I don't VPN and the error occures not related to sending emails

[d19dotca]

No VPN for me either and I saw this same loopback_is_rejected error in my logs which I pasted for a possibly related issue here: https://forum.cloudron.io/topic/12974/hetzner-ptr-record-invalid/12?_=1735543281810

By any chance are you on 8.2.0? or 8.2.1?

[Kubernetes]

@d19dotca 8.2.1 and i confirm invalid (not existing) dkim in tests on my cloudron instance

[nebulon]

Can you try to run the "Redo DNS Setup" task from the status tab in the mail view of that domain and see if the records get fixed up?

[Kubernetes]

@nebulon thx, I tried, no errors during redo, but the result is the same. DKIM is still missing for outgoing emails. I will continue to monitor if the looopback error still appears.

The loopback error still exist:

Dec 30 13:11:07 TypeError: Cannot read properties of undefined (reading 'loopback_is_rejected')
Dec 30 13:11:07 at exports.checkZoneNegative (/app/code/haraka/node_modules/haraka-plugin-dns-list/index.js:347:22)
Dec 30 13:11:07 at exports.check_zone (/app/code/haraka/node_modules/haraka-plugin-dns-list/index.js:372:20)
Dec 30 13:11:07 at async Promise.all (index 1)
Dec 30 13:11:07 at async exports.check_zones (/app/code/haraka/node_modules/haraka-plugin-dns-list/index.js:393:5)

[d19dotca]

@nebulon I can confirm sync DNS doesn’t do anything to fix the issue. The issue isn’t DNS, I think it’s in the Haraka SMTP side. Please refer to the other thread too where there’s some more details. I think these two threads are effectively the same issue around DKIM not working.

[nebulon]

I think we have hit this now also on our own Cloudron, so should be faster now to fix with a easily reproducible setup on our end

[girish]

The error here is unrelated to the DKIM issue. This seems to come from the dnsbl plugin. I am submitting a PR upstream to fix it.

[girish]

https://github.com/haraka/haraka-plugin-dns-list/pull/11/commits should fix it