Hi there ​@Dara,

Sorry you’re dealing with this! Was an email sent to these customers through Klaviyo or through Shopify? If it’s through Klaviyo, you should be able to create a segment of everybody who received this email to isolate them. If Shopify sent out the email, you can export the recipients and then upload them as a CSV file into Klaviyo.

It’s definitely possible to send them an email that asks them to resubscribe. I’d recommend including a link in your campaign that takes them to a page on your site with a sign-up form or a subscribe page, where they can re-subscribe.

That being said, if you’re confident that all of these people are actually subscribed, and that they were unsubscribed in error, you can upload them to Klaviyo via CSV file, and update their consent statuses.

In the CSV file, add a column titled “Email Marketing Consent” and set the value for everybody to “Subscribe”. Then proceed with the upload. You can see a full list of steps on how to do this in this article. Note that you should only do this if you know that all these profiles have subscribed.

Let me know if you have any additional questions about this process. Happy to answer, if so!

-Byrne

Thank you for your suggestions! I'll do that.