Hi @Marijke,
Glad you’re getting Customer Hub set up!
From what you described, this sounds less like Klaviyo sending the same verification twice and more like 2 separate authentication steps happening one after the other: one through Customer Hub, and one through your existing account login flow. The conditions when you would see both typically are: if you are using legacy shopify account (not-verified), and if the OPT code has not been verified. Do you see a place to enter the OTP code in your site when logging in via the customer hub portal?
And on the sender address, I completely understand why mailer@success-mail.com would not feel ideal. I’m not seeing enough in the docs to confirm whether that sender can be changed for this specific Customer Hub verification email, so Support would be the best team to confirm that directly.
Since this seems very specific to how Customer Hub is interacting with your existing login experience, I’d recommend reaching out to Support so they can take a closer look and confirm whether the double verification is expected in your setup or whether something is misfiring!
Temi@Klaviyo
