Dear Maintainer,

I found this behaviour in icedove:

1. Click "Write" to compose a new message
2. Attach a PDF file
3. Double-Click the attached file (i.e. to verify it's the right one)

Expected behaviour:
Icedove asks whether to open or save the file, and when clicking "open", the
attachment opens with the associated application

Real behaviour:
Icedove asks whether to open or save the file, and when clicking "open",
nothing happens

Until now, I can only reproduce that with PDF files, but not with plain text,
OpenDocument, JPEG - these behave as expected.
Opening PDF attachments from *received* messages (or messages in the "Sent"
folder) works as expected. Occurs with several different accounts.

Since I regularly double-check attached files before sending, I am pretty sure
this worked in earlier versions.

Might be an upstream bug since it occurs in thunderbird for Ubuntu as well.

I tried running icedove from the console but got no helpful output. Tried in
safe mode, does not change anything.

Hello Andreas,

my setups work as you expected.
Please check the settings for Icedove Settings in

Menu -> Edit -> Preferences -> Attachments; Incomming -> Content Type 'PDF File'

There you have probably 'Save File' selected.

Regards
Carsten

Am 05.07.2016 um 16:47 schrieb Carsten Schoenert:

I took a look at these settings and actually found two associations for
PDF files. One is labeled "application/pdf: .pdf", the other
"application/force-download: .pdf". Both were initially set to "Always ask".

I found out that "application/pdf" is applied to all *received* mails
with PDF attachments, whereas "application/force-download" is used when
*writing* a message. If I change "application/force-download" from the
default to e.g. "evince", then it works as expected.

This is not unusual since "application/force-download" is not meant to
be opened with any application. The question is, why is
icedove/thunderbird using the MIME type application/force-download in
this case?