In your mailing list, the number in the "Sent" column represents all of the emails that have been sent and not opened. You can also go into an influencer's profile and revisit the past email exchanges between you and them in their email tab. 

If you want to see your email conversations with an influencer, you can also go into their profile and select the email tab. This will pull up all of your past email exchanges with this influencer. 

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