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Notify Me only emails Waiting subscribers on that variant, and only when send rules pass. Check Subscribers first.
Cause: No subscriber, or they already moved to Notified, Bounced, or Unsubscribed.Fix: Confirm a Waiting row for that product and variant. If they already subscribed, the popup says they are registered. See Subscribers.
Cause: Minimum stock before sending alerts is higher than the new quantity.Fix: Add more units, or lower the threshold to 0 on the Back in stock widget. See When alerts send.
Cause: Shopify continues selling at zero, or quantity tracking is off, and the matching notify checkboxes are off.Fix: Match the inventory rules on the Back in stock widget to how those products are set in Shopify.
Cause: Alerts only send for Active products.Fix: Set the product to Active in Shopify, then restock or drop the price again.
Cause: Sender settings are incomplete, so the alert cannot leave.Fix: Finish DNS and Check verification, then save Sent from Name. See Add a custom domain.
Cause: Register domain returned DE_150: Antispam validation failed for your domain in Accounts. The domain failed the anti-spam check, so Notify Me cannot add it.Fix: Email [email protected] with the domain you tried to add. Do not keep retrying the same domain. Alerts keep using the default Notify Me sender until this is cleared. See DE_150 anti-spam check.
Cause: Shopify development stores cannot send alert emails. The app shows a banner.Fix: Test widgets and subscribers here. Send live alerts from a paid or transfer store.
Cause: The mail provider rejected the address. Status is Bounced.Fix: They will not get further alerts to that address. Ask them to subscribe with a deliverable email.
Cause: This month or today is at the cap on Settings.Fix: Wait until the next UTC day or month. See Settings.
Cause: Price drop alerts need a strictly lower price than at signup. Compare-at alone does not send.Fix: Lower the variant price in Shopify. See When alerts send.