I usually delete them.
There were emails I got which has kalma written in them, then the email followed by the next line stated a fatwa: “if you do not send this email to 50 people, you will burn in hell fire.”
I dont think its written in Quran or any Shariya law to make fatwas regarding Pre defining, God’s Justice or saying that “oh if you do not do what I told you God will send you to hell. lol”
So I usually delete them 