Email domain check
Is tempinbox.com a disposable email domain?
Yes: tempinbox.com is a temporary inbox service. Here is what that means for your signup form, with mail-server data checked in Oct 2026.
Yes. tempinbox.com is a temporary inbox service: anyone can read or create an inbox there in seconds, so a signup from it is almost never a customer.
tempinbox.com at a glance
| Check | Result |
|---|---|
| Type | Disposable |
| On the disposable list | Yes |
| MX records | None published |
| Mail operator | Self-hosted throwaway service |
| Checked | Oct 2026 |
Why signups from tempinbox.com cost you money
People reach for tempinbox.com when a form asks for an email they do not want to give: to grab a free trial, a discount code or a download. The account looks real in your database, but the welcome email, onboarding sequence and receipt all go to an inbox nobody reads again.
The damage is quiet: inflated signup numbers, trial-to-paid rates that look worse than they are, bounces that hurt your sender reputation, and in the worst case one person farming endless trials with a fresh tempinbox.com address each time.
How to block tempinbox.com on your signup form
The quick fix is a domain check before the account is created. Our free list of disposable email domains includes tempinbox.com and is public domain (CC0):
const res = await fetch('https://usevetto.com/disposable-domains.json');
const throwaway = new Set(await res.json());
function isThrowaway(email) {
const domain = email.split('@').pop().toLowerCase();
return throwaway.has(domain); // true for 'tempinbox.com'
}A static list goes stale within weeks, because new throwaway domains appear daily. Vetto keeps the list current, also checks the domain's mail servers live, and shows the visitor a friendly message instead of a dead end.
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Frequently asked questions
Is tempinbox.com a temporary email service?
Yes. tempinbox.com is on Vetto's list of disposable email domains: anyone can receive mail there without an account, and the inbox is usually public or deleted after a short time. Treat signups from it as throwaway.
Should I block tempinbox.com on my signup form?
For a free trial or a freemium product, yes: people use tempinbox.com to grab a trial without giving a reachable address, so the account never activates or pays. Show a friendly message asking for a real address instead of a silent error.
Can tempinbox.com receive email?
When we checked in Oct 2026 it published no MX record, so new mail may not arrive at all. It is still on the list because old signups from it are equally worthless.
Give your signup form sharp eyes.
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