[Rspamd-Users] symbol "MIME_BAD_ATTACHMENT" firing on PDF/A attachments?

[Aban Dokht]

On 2/4/2026 6:44 PM, Gerald Galster wrote:

> According to https://www.rfc-editor.org/rfc/rfc8118.html the mime type
> for "PDF/A" ("PDF for Archival") is "application/pdf", not "application/pdfa".

I fully agree with you, the correct mime type should be application/pdf 
for PDF/A

> 
> If this bothers you, have a look at /etc/rspamd/modules.d/mime_types.conf
> extension_map (local.d/override.d) or see https://docs.rspamd.com/modules/mime_types/.

I'll try to ensure that application/pdfa is treated the same way as 
application/pdf

> We will likely see more emails like these due to European Union regulations
> for electronic invoicing - EN 16931 / XInvoice / ZUGFeRD and PDF/A.
Yes, the crucial email was exactly of that nature (ZUGFeRD), send from 
DATEV.

For those who don't know DATEV:
DATEV is a leading German cooperative IT and software company that 
mainly serves tax advisors, auditors, lawyers, and their clients.

I should point out to them that this is a mistake, referring to RFC8118

Regards
Aban

-- 
  Aban Dokht                                   aban.dokht at abando.de
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