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Is there a way to determine if two gmail emails came from same device?

Posted: Thu Dec 06, 2018 9:36 pm
by DotComJoel
If someone creates multiple gmail accounts, is there any common thread in the headers of the email headers that could show that their all coming form the same sender (besides IP address). Are there any other unique identifiers in the headers that can show the gmail accounts are being sent from same sender?