# Disposable email

A disposable email is a temporary address from a throwaway inbox service, used to get past a signup form without giving a real, lasting inbox. The address often stops working within minutes or days, so signups made with one usually can't be reached later.

Canonical page: https://getlaunchlist.com/glossary/disposable-email. Updated 2026-10-15.

## How disposable email works

A throwaway inbox service hands out a working address in seconds, with no account and no password. The person uses it to get past a form, perhaps to claim a download, try a product, or earn a referral reward, and walks away. Depending on the service, the inbox self-destructs after minutes or days, or stays open but is never checked again.

People don't always use them to cheat. Many simply don't want another company emailing them. That is useful to know: a disposable address often means "interested, but not enough to give you my real inbox".

## Why it matters for a waitlist

- **You can't reach them.** The whole point of a waitlist is to tell people when you launch. A throwaway inbox won't be there to hear it.
- **Your numbers look better than they are.** Signups you can never reach make the list look bigger and your conversion rate look healthier.
- **Referral programs get gamed.** Throwaway inboxes are the easiest way to fake friends and climb a line.
- **Sending to them hurts.** Mail to a dead inbox bounces, and bounces count against your [email deliverability](https://getlaunchlist.com/glossary/email-deliverability). Some abandoned addresses end up as [spam traps](https://getlaunchlist.com/glossary/spam-trap).

## How detection works

Most detection compares the domain of an address against a list of known throwaway providers. Good lists hold tens of thousands of domains and change constantly, because new services and new domains for old ones appear every week. Two further checks help: whether the domain can receive mail at all, and whether many signups using the same new domain arrive in a short time.

No list is complete, so detection is a signal, not a verdict. That is why many tools combine it with other evidence before refusing anyone.

## Block, hold or flag

| Approach | What happens | When it fits |
| --- | --- | --- |
| Block | The signup is refused at the form | A form under attack, or one where signups earn rewards |
| Hold | The signup is saved but waits for your review | You want to decide case by case |
| Flag | The signup joins, marked as low quality | You want every signup, and to filter them later |

A [honeypot field](https://getlaunchlist.com/glossary/honeypot-field) catches bots. Disposable-domain detection catches people who are real but unwilling to be reached. They solve different problems, which is why forms use both.

## Disposable email in LaunchList

LaunchList recognizes tens of thousands of throwaway email domains, and the list is refreshed every week as new ones appear. A throwaway inbox adds to a signup's spam score and lowers its trust verdict on [Contact Trust](https://getlaunchlist.com/features/contact-trust). One weak signal alone rarely stops anyone, but together with others, such as a burst of signups from one device, it holds the signup for you to approve or block. Raise the strictness setting and more signups are held.

A held signup has no place in line, can't earn or give referral credit, and never counts toward your contacts. Throwaway inboxes are also left out of every email you send. If you want to turn away certain domains entirely, a form can allow or block signups by email domain, with your own message for anyone turned away.

## Frequently asked questions

### How do I block disposable email addresses?

Compare the domain of each signup's address against a maintained list of known throwaway providers, and refuse, hold or flag matches. The list has to be updated regularly, because new throwaway domains appear all the time.

### Are email aliases and forwarding addresses disposable?

Not in the same sense. Privacy relay services, such as Apple's Hide My Email, create a unique address that forwards to a real inbox the person keeps. Mail sent to it reaches them, so treating relay addresses as throwaway turns away real people.

### What share of waitlist signups use disposable emails?

It depends heavily on how you promote the list. A niche community sends almost none, while a public prize or a reward for each signup draws more. Rather than assume a number, look at how many of your own signups use throwaway domains and how many bounce.

### Should I block disposable emails or just flag them?

Flagging is safer when the cost of turning away a real person is high, because detection is never perfect. Blocking makes sense on a form under attack or where every signup earns something, such as a referral reward.

## Related terms

- [Honeypot field](https://getlaunchlist.com/glossary/honeypot-field.md)
- [Email deliverability](https://getlaunchlist.com/glossary/email-deliverability.md)
- [Spam trap](https://getlaunchlist.com/glossary/spam-trap.md)
- [Single opt-in](https://getlaunchlist.com/glossary/single-opt-in.md)