In tracking reports you may have seen the following link reported as being tracked:
[merge sites_.GuiHost_]/tracking/FilterClick.aspx?m=[merge members_.memberid_]&outmailid=[merge outmail.messageid]&lists=[merge lists_.listid_]
This link is an anti-bot pixel placed at the top of all emails sent from Delivra. Any click activity reported for that link is most likely registered by the contact's personal firewall or anti-spam software checking the mailing. To learn more about bot clicking please visit this help center article.