Hi,
I sent a mail for our client Pentair. It is the last email sent under the folder 'Campagnes' - 'Food and beverage' named 'Colleagues no account - FB Newsletter January 2020 - PENTAIR Food & Beverage Business Insights'.
I am one of the recipients, however, after I have opened the email the statistics are not changing (open ratio remains 0%).
How is this possible?
Thanks in advance!