Collecting metadata about email is OK - as in, who you mailed, and who mailed you. This information is no more private than the address on an envelope being sen

Collecting metadata about email is OK - as in, who you mailed, and who mailed you. This information is no more private than the address on an envelope being sent to you via the postal service. Collecting the email itself I think has a higher bar to cross - the logic used in the CDR collection was akin to that of the postal mail address question.