I received this email attempting to scam me into renewing my antivirus subscription. The scammer was quite foolish to send it from a Gmail account! 
@minger @nyuuzyou
Even though I’ve never used Norton Antivirus! 
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Another common tech support scam. If you haven’t deleted email yet, Norton asks to forward such emails to them - [email protected].
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thats how a typical av scammer is. 1 little brain cell.
Also i did try to reverse search the email but couldn’t get anything useful.
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Great @nyuuzyou thanks for letting me know!
Do you have any idea to detect these kinds of SCAM emails?
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Yes, @minger , sometimes header analyzers are not as useful as we expect.
That’s actually a pretty interesting question. If we are talking about an individual business, then probably the only way is to warn and educate its users. Or the method of introducing “secret phrases” that the user sets himself and the corresponding service sends it in each email to confirm that the sender is genuine. But this is obviously not suitable for all companies, and also can be quite problematic in implementation. If we are talking about the level of, say, an email provider, then a combination of methods are used. For example, using SPF, DKIM, and DMARC for email authentication and machine learning algorithms. If the service is large enough for its own dataset, collecting and manually processing reports from users can be a pretty good addition.
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@nyuuzyou Nice idea! I liked the ‘secret phrase’ one. But I think it may not work for every organization.