Originally Posted by
dogsridewith
So any _ _ _ _ _@Outlook,com user can make up an infinite number of _ _ _ _ _ prefixes that show up in the Sender address on emails sent to my inbox?
I may be out of date here, I think email has relatively recently become more secure but I expect there are still ways to accomplish what I describe.
The from address on an email is exactly as secure as the "From" or "If undelivered Return to" address written on the back on an envelope.
Anyone can put anything they like on it and pop it in the post. No one checks the truth of it before delivery.
It would be interesting to hear if this has in fact changed. I doubt I could send such a message now although I have done so previously (only to myself or colleagues as a test) but it may be possible to find a mail relay that would accept such messages.