attachment filename in iso 8859 / utf-8 not working after upgrade

bheam

After upgrading to latest and greatest, some attachments just show as "attachment1" in outlook.

mail headers are:

--=-RvjNZXn5fUViJcMHQXJA
Content-Type: application/pdf; charset=utf-8;
name=iso-8859-1''Faktura%201805%20fra%20AGDER%20R%D8RSPYLING%20AS.pdf
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename=iso-8859-1''Faktura%201805%20fra%20AGDER%20R%D8RSPYLING%20AS.pdf

Thanks,

Michael

WalterH

bheam Are this mails created with EWS (Apple Mail or Apple OL)?

freeloadermatt

bheam
+1 I am seeing something very similar. Two attachments "attachment1" and "attachment2" as shown below.

attachment1 contains a text version of the email with image links. Example "Hello World here is an image [cid:image001.jpg@01DAFAC9.749DCC80]"
attachment2 contains html of the same email. Example "<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" [blah blah blah] <p class="MsoNormal"><span style="font-family:"Montserrat Light"">Hello World here is an email"

Using Debian 12 Bookworm with gromox (2.30.60.gcef3d09-1+41.1)
WalterH the problem seems to happen when emails are sent from MS Exchange (external users with Microsoft-Branded Exchange and Outlook) and Apple IOS Devices

bheam

WalterH Unlikely, they're invoices, so probably generated from some kind of onvoicing system.

I'm also 90-99% sure this is a regression, as i'm pretty sure these emails were working before i did the upgrade.

PRJ

We are having this problem with the attachments renamed to "attachment1" (without file-ending) since we switched to grommunio last year.
I've created a ticket on the 30.05.2023. It has todo something with the convertation and the (new) Vmime library is required. A look into the roadmap shows:
Q4 2024
"Further improved support for Internet Mail specifications (VMIME)"

At least that is the situation/info I have, don't know if this behavior described here is the same?!

WalterH

I only see this issue with mails created on MAC OS X and EWS as transport.

bheam

WalterH I'm not sure what you mean by that. Do you mean that Macos / EWS creates some headers in the mail that messes with outlooks ability to read the attachment names?

WalterH

Yes.

bheam

Well here's a link to full redacted mail headers anyway:

https://pastebin.com/dnU2Pv1g

bheam

bheam I see the link has expired. Let me know if you need it again.

cbka

this happens here, too would you please again post the header ? @bheam