On Fri, 2025-03-21 at 16:28 +1030, Tim via users wrote:
> On a whim, I picked "unclassified" for this reply, to see what it does,
> and if it makes it through the list server.
I see it does. It added a header "Security: Unclassified". But for
you to know anything about this while reading your mail, you will have
to configure
Evolution preferences
mail preferences
headers
And add "Security" to the list of displayed message headers.
And, you need to have the basic amount of headers (to, from, date,
subject, etc,) showing when you read the message. Or open the message
in its own window.
If you collapse the message headers down to a single truncated line
above the message (just showing "subject" and "from"), in three-pane
view, you get no clue about security status, nor any other headers.
It's not readily apparent, and you have to configure things to see it.
Perhaps if you customise the GUI it might be possible to show a
security header more boldly. It's the kind of thing that should be
prominent, not hidden.
Customising the GUI's done by hand-customising some XML files. I did
that ages ago to add a filter button to the tool bar to manually apply
filters to the current message.
I modified /usr/share/evolution/ui/evolution-mail-reader.ui (that's the
main toolbar for the program). There may be some way to add a security
status display to be always present in some obvious spot.
The actual headers you can insert into messags seems to be controlled
from:
/usr/share/glib-2.0/schemas/org.gnome.evolution.plugin.email-custom-header.gschema.xml
<?xml version="1.0" encoding="UTF-8"?>
<schemalist>
<schema path="/org/gnome/evolution/plugin/email-custom-header/"
id="org.gnome.evolution.plugin.email-custom-header" gettext-domain="evolution">
<key type="as" name="custom-header">
<default>['Security=Personal;Unclassified;Protected;InConfidence;Secret;Topsecret']</default>
<summary>List of Custom Headers</summary>
<description>The key specifies the list of custom headers that you can
add to an outgoing message. The format for specifying a Header and Header value
is: Name of the custom header followed by “=” and the values separated by
“;”</description>
</key>
</schema>
</schemalist>
--
uname -rsvp
Linux 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 x86_64
Boilerplate: All unexpected mail to my mailbox is automatically deleted.
I will only get to see the messages that are posted to the mailing list.
--
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