[Rspamd-Users] MIME_BAD_ATTACHMENT Question

[Alexander Moisseev]

On 09.10.2018 16:20, Thomas Plant via Users wrote:
> Hello,
> 
> I'm getting the MIME_BAD_ATTACHMENT symbol on some mails.
> 
> The Mails have attachments with .html and .csv extensions. Here an example out of the source of such an email:
> 
> Content-Type: application/octet-stream;
>   name="2018.html"
> Content-Transfer-Encoding: quoted-printable
> Content-ID: <D2D9C578E72C6648A16BD9BDB9B085CE at EURP191.PROD.OUTLOOK.COM>
> X-Rtf-RenderingPosition: -1
> Content-Disposition: inline;
>   filename="2018.html"
> 
> 
> 
> These are legit mails in my eyes and how can I set this to be valid attachments.
> 

This doesn't mean the mails are non legit, just the software that generated them is bad.
Valid content type for .html is "text/html" and for .csv is "text/csv".
For now content types are hardcoded in the mime_types.lua module.
If you really want to change valid content types you have to patch the module.