bug#29074: 26.0; Cannot sent bug report in Emacs 26 pretest

[Drew Adams]

I tried again, after closing Outlook altogether.

This time I got the error message "Cannot start Microsoft Outlook. The command 
line argument is not valid. Verify the switch you are using."

Attached are the two error messages.

It seems that using a mail client from `M-x report-emacs-bug'
is broken for the pretest.  But sometimes I have been able
to send bug reports from it, I think.

throw-emacs-bug-29074-1.png
Description: PNG image

throw-emacs-bug-29074-2.png
Description: PNG image