[Rspamd-Users] weird MIME penalisation on (IMO) right formated mail attachments - RSPAMD or our mistake?

[G.W. Haywood]

Hi there,

On Tue, 15 Apr 2025, Franta Hanzlík wrote:
> On Tue, 15 Apr 2025 "G.W. Haywood" wrote:
>> On Tue, 15 Apr 2025, Franta Hanzlík wrote:
>>> On Mon, 14 Apr 2025 Franta Hanzlík wrote:
>>>
>>>> At our high school we have now problem with internal mail delivery -
>>>> ...
>>> ...
>>> Personally, as the best solution to my problem I would like an algorithm like:
>>>
>>> if (mail_from_mydomain && mail_to_mydomain) then ...
>>> ...
>> ...
>> Can you not whitelist the mail which you do not wish rspamd to filter?
>> ...
> ...
> ... I would probably be able to write some ?selector? map to whitelist
> emails from our domain to our domain - but if it were possible to make
> it more precise/refined to whitelist only specific types of attachments
> or to nullify the effect of penalizing some symbols (MIME_BAD_EXTENSION,
> MIME_BAD_ATTACHMENT, MIME_BASE64_TEXT, R_MIXED_CHARSET,...), that would
> be even better.
> ...

Take a look at

https://rspamd.com/doc/modules/mime_types.html

(especially the last paragraph) and also at

https://rspamd.com/doc/configuration/settings.html

I think that should help you.

-- 

73,
Ged.