And the worst part is this stuff is damn near undetectable. Maybe my buddy hasn't responded because he's got a lot going on at work at the moment. Or maybe my

And the worst part is this stuff is damn near undetectable. Maybe my buddy hasn't responded because he's got a lot going on at work at the moment. Or maybe my DKIM/DMARC records aren't playing well with his mail forwarder. Pretty difficult for me to tell - I'm not in the habit of phoning someone to tell them I sent them an e-mail.