Question Let's Encrypt Error while using webmail with roundcube

[Pascal R-B]

Hi,

I've got a litlle problem with the Let's Encrypt tool of plesk. I have some Sevice Plans where I selected roucndcube as Webmail. When I try to generate a cert for a webmail-domain, where I use this Service Plan, I've got every time an error:

Type: urn:acme:error:unauthorized
Status: 403
Detail: Invalid response from ... Not Found

If I use a Service Plan without roundcube, I normally can create a cert ...

Can anyone help ?

 

[IgorG]

First of all, before generation certificate make sure that your hostname webmail.domain.tld is resolvable.

 

[Pascal R-B]

The webmail.domain.tld connects to the server, if I don't use roundcube all works fine. The Problem is only then, when I choose RoundCube as webmail. I think that RoundCube is in another dir than the home dir where the .well-known folder is. So it can'T find the file of the scme-Challenge. But I am not sure.

 

[Bitpalast]

The only 403 errors I ever encountered were caused by ModSecurity (web application firewall). Could this be related to a specific ruleset you are using in ModSecurity?