I have recently set up a Klaviyo account and integrated it with my Shopify store. I have just over 2,000 profiles and according to Shopify, nearly 1,300 are subscribed to our emails. However, when uploading these contacts to the Newsletter list, the list only populated just over 900 profiles.

This means that I have around 350 people who are supposedly subscribed to receive emails from us but are not in my Newsletter. Why might this be and how can I fix it?

I have read the Whats the difference between accepts marketing and the Newsletter list? question which recommends using the ‘Subscribe customers who Accept Marketing to a Klaviyo list’ check box but I do not appear to even have this option in my Shopify integration settings and even if I did I’m not sure whether that would back-populate to include profiles that have already been uploaded.

Can anyone offer any solutions to this? I am reluctant to start sending emails until this issue is resolved.