I know there's been similar threads before, however they were deleted due to the My Opera shutdown.
I am using Opera Mail with Windows 7 and cannot find the way to set Opera Mail as a default email client for windows. It is very troublesome, because I cannot use "send email" option in many programs, I got notification "default email client not set". And Opera Mail is not present in "default programs" list on Windows 7.
Any solutions to that?