https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/an-in-depth-look...
I can provide another dozen of extremely indepth reasons why your "mailto" system can be exploited, or used to exploit.
I cannot remember if this is the person that suggested I should educate myself. Please, Please, educate yourself.
Oh, I see now. You say I am "making things up".