I found a temporary work around.
In Automator services, I added a new service!
And it works for me just fine, till someone comes up with a better solution.
See my screen capture for specific details how to (should be easy to follow since it is my first time I used Automator) and I am a Dummy.
Important is to select your email service of your choice (gmail in my case) to send messages and attachments.
That will tell the OS X Mail client to use that service to send emails.
Save your Automator service file (give it a easy name you want to appear in the Finders right click popup window). Something like "Send file by email".
Now when I right click on a file in Finder it shows that service at the bottom of the popup window. Now just follow the instruction and see it work.