You'll be considered SPAM almost everywhere. It doesn't matter what you do. It doesn't matter that you are replying to an email and the message-id is referenc

You'll be considered SPAM almost everywhere. It doesn't matter what you do. It doesn't matter that you are replying to an email and the message-id is referenced. It'll be considered SPAM. DKIM, DMARC and SPF mitigate it a bit, but not really. Yesterday I had a form ask me for my email and it only accepted @gmail.com Every other domain I tried was refused as invalid. Email is dead.