Opening email messages in Thunderbird under Fedora 25 (and older versions)

[Andreas Aßmann]

Re: Opening email messages in Thunderbird under Fedora 25 LXDE (and 
older versions)

Case 1:

I receive an email message in Thunderbird, this message remains INSIDE 
the Thunderbird-GUI and I do NOT delete it there:

In this case I can open the email message without any problem, as often 
as I want to do it.

Case 2:

I receive an email message in Thunderbird and open it inside the 
Thunderbird-GUI. But as I see the message is important, I decide to
- save it OUTSIDE the Thunderbird-GUI for further use, e.g. on a 
usb-stick or a hard disk, and
- delete it INSIDE the Thunderbird-GUI in order to clean the 
Thunderbird-GUI.

In this case I cannot open any more under Fedora/Thunderbird the email 
message I just saved on the usb-stick a moment ago (in contrast to 
Windows where this procedure works wiithout any problem). And I get the 
following error message, instead:

#####
This text file "xxxxxxxxxxxxxx.eml" seems to be an executable script. 
What do you want to do with it?
Execute
Execute in Terminal
Open
Cancel
#####

And wherever I click on (execute, execute in Terminal, open) nothing 
happens and the email doesn't open. I then open it with an other email 
client (Sylpheed).

Does anyone know what has to been done to get mails opened with 
Thunderbird/Fedora OUTSIDE the Thunderbird-GUI?

Thanks, greetings

Andreas