First-Order Discount Sign-Ups: Finding the Disposable Emails in Your Store List
A store's discount popup collects some addresses that exist only to claim the code. Run the list through a disposable email checker and suppress every row marked Disposable address. The bulk disposable email checker flags them in your browser, and the email verification for e-commerce stores page covers the wider list check.
Why it matters
Throwaway addresses cost you without selling. They sit in your list and count against any plan priced by profile count. They also show up in your engagement numbers as people who never open. If a code can be claimed again with a new throwaway, the same visitor may use several. For the account side, see fake customer accounts on Shopify.
Step 1: export the popup list
Export the subscribers who joined through the discount form. In Klaviyo, filter by the form or source. Our Klaviyo export guide shows where.
Step 2: check for disposables
Paste or upload the list. Any row marked Disposable address is invalid for marketing. Add the full verification on the verify page to catch Mailbox not found and Typo domain at the same time.
Step 3: look at the pattern
Count the share of disposables by source. The bounce rate by source tool helps compare forms. If one popup produces many, the offer or the form is the issue, not the list. Our note on blocking disposable emails at sign-up covers keeping them out going forward.
Step 4: suppress and keep the order history
Suppress, do not delete. The customer record and orders stay, and the address stops getting campaigns. A genuine buyer who used a throwaway at checkout can still be reached through order emails, which go through a different path.
Step 5: change what the popup gives
Some stores send the code by email, so a fake address gets nothing. That filters casual abuse without any check. Whether that suits your conversion goals is a store decision, and worth testing against your own numbers.
What this cannot do
- A new disposable domain may not be known yet, so the list is not exhaustive.
- It cannot tell a bargain hunter from a real customer.
- It does not stop a determined person from using several mailboxes.
Check your popup list
Upload it on the verify page: the first 100 checks are free with a Google sign-in, no card. See pricing for bigger lists.
Common questions
Why do discount popups collect disposable emails?
Some visitors only want the code and use a throwaway address to get it. The address works long enough to receive the code, then goes dead.
How do I find disposable emails in my store list?
Run the list through a disposable email checker. Rows come back with the reason Disposable address, so you can count them and suppress them.
Are all disposable addresses bad?
They are not valid contacts for marketing, because the mailbox is meant to be short-lived. Suppress them from campaigns.
Can I stop them at the popup?
Yes, with an email check in the sign-up path through an API. That is a build, so many stores clean the list periodically instead.
Is the check free?
The first 100 checks are free with a Google sign-in, no card.
Check your list before you send
Real mailbox checks over SMTP, and nothing is sent to the address. Sign in with Google and your first 100 email checks are free, no card. Plans for bigger lists are on the pricing page.