Problem configure Nextcloud-Roundcubemail

Support
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1

We have : NS8 + Mail_1.7.11+ Nextcloud_1.6.1 (32.0.6) + SOGo_5.12.7 + Roundcubemail_2.1.3[]

All OK via [https://cube.firma.de] → think, DNS intern/extern is OK

Now installed “Roundcube-Client for Nextcloud”

NS8 →Administration → Roundcube-integration

NS8 → User Configuration

Try to start the RC-Client. But always the same notice:

RoundCube-Wrapper für Nextcloud

Die Anmeldung bei Roundcube ist nicht möglich. Es liegen Anmeldefehler vor.
Bitte überprüfe deine persönlichen Roundcube-Einstellungen. 
Möglicherweise hilft eine erneute Anmeldung bei Nextcloud.
Andernfalls wende dich an deine Systemadministration.

english: You are unable to log in to Roundcube. There are login errors. Please check your personal Roundcube settings. Logging back in to Nextcloud may help. Otherwise, contact your system administrator.

Where is the mistake ? Found no HowTo for this situation …

2

Are you configuring a Nextcloud plugin for Roundcube Mail? In this case, the Nextcloud app does not provide automatic configuration. Try configuring it from the native Nextcloud administration panel, obtaining the IMAP parameters with:

api-cli run module/traefik1/list-service-providers --data '{"service":"imap"}' | jq

Replace traefik1 with any module ID returned by runagent -l.

3

Thanks!

Tried this yesterday, but not much better. Now there is a new error (translated de→en and urls are edited):

RoundCube wrapper for Nextcloud

Access to the contents of the wrapped Roundcube instance is not possible. 
This may be due to cross-domain access restrictions. 
Please check whether your Nextcloud instance (https://cloud.firma.de) 
and the wrapped Roundcube instance (https://cube.firma.de) 
are being accessed from the same domain.

Don’t understand this message ??? Both are in the same domain, what is meaning ???

4

Sorry I don’t know how this plugin works. Maybe someone did some experiments? /cc @stephdl @mrmarkuz

2 Likes
5

hello no idea how it works, IIUC you reached the url, but inside nextcloud you have the issue to use roundcubemail, is that correct !

6

Hello Stephane,

we used first snappymail in nextcloud, but now no actual updates … then nextcloud-mail. But nextcloud-mail is terrible, nice features, but very slow with 1000 mails and so on. We are looking for a substitute, if possible with nextcloud integration. Sogo is nice for the admin, but the others don’t like it.

That’s why we installed roundcube → web frontend is OK.

But all wish the nextcloud client integration. Nextcloud is the most integrated tool to working together with fieldworkers.

1 Like
7

roundcubemmail 1.7.1 is coming … I am testing it

2 Likes
Roundcubmail: CVE-2026-48842, CVE-2026-48843, CVE-2026-48848, CVE-2026-48844
8

??? in Nethserver it shows me Roundcube V.2.1.4 Or you mean the Nextcloud-Roundcubemail-App ( is now 1.2.2 ???

I think now, the right way is to find out, why the app (nextcloud mail) is too slow. I found a link about this problem, but working within a docker image is too complicated for me …

and I’m sure, you know this all :

9

this is the version of the nethserver module ns8-roundcubemail, 1.7.1 is the version itself of roundcubemail