Can someone explain in simple terms what does it mean, that an email has no SPF, DKIM, or DMARC (from what I read and understood is that this email is likely to end up as as spam or rejected by the email server, kindly correct if wrong).
What I am trying to understand is how adding a digital signature to such an email be like, would it make this email legit, or allow the email to prove that it's not junk.
The email has a valid digital signature, and thunderbird says the message isnot encrypted.
