Catch disposable email domains static lists miss, and verify uncertain ones before turning customers away.

Frequently asked questions

What is a disposable email domain?

A disposable email domain refers to the root domain name used by a disposable email address (DEA). In the disposable email address example@zevars[.]com, for example, the disposable email domain is zevars[.]com.

Are there other terms used for disposable emails?

A disposable email is also known as a “throwaway email address,” “fake email address,” “temporary email address,” “burner email address,” “single-use email address,” “use-and-throw email address,” and “one-off email address.”

What can disposable email domains be created for?

Disposable email domains can serve various purposes. Disposable email addresses can be used by those who want to protect their privacy or to avoid receiving spam or unsolicited messages in their official mailboxes.

Disposable email domains may also be used for repeated registrations to a service, possibly leading to freemium abuse, and are sometimes found to be used in spam and phishing.

Who can use disposable email domains lists?

A list of disposable email domains is handy for SaaS business owners and website administrators who want to ensure that users only sign up to their services with their official email address. By doing so, they increase their chances of converting users.

Cybersecurity teams can use a list of disposable email domains to weed out and block possible malicious emails.

A disposable email domains list can also help marketing professionals clean their contact lists to improve vital marketing metrics.

How often do you update your list of disposable email domains?

Our disposable email domains database is updated every day. We keep an eye out on disposable email providers worldwide, and we regularly add new disposable email domains to our already extensive list of more than 162,000.

Daily updates to our database ensure that new disposable emails are constantly monitored, and you can spot malicious ones before they do any damage. In our latest benchmarks, the nearest competitor missed 1 in 20 live consensus disposable domains. Daily refresh is a big part of how we avoid those gaps.

How do we measure precision?

Detection precision is 99%, meaning that virtually all domains we flag as disposable genuinely are. In practice, that helps reduce the risk of blocking real customers by mistake. Unlike many vendors in this space, who quote one blended “accuracy” number or none at all, we show how we measure it. Precision is measured on a temporal holdout of feed domains at our production serving threshold. We also test from the other direction, with zero false positives across 500 independently sampled corporate domains.

What do the classification tiers mean?

Every domain in the feed carries a 0–100 confidence score and one of four classifications:

• Disposable (92–100). The domain almost certainly belongs to a disposable email service.
• Likely-disposable (62–92). Most signs point to a disposable service, but there is not quite enough evidence to be certain.
• Unknown (42–62). There is not yet enough evidence to say either way.
• Free (0–42). The domain behaves like an ordinary free email provider, even though it appears on some community blocklists.

How is this different from a free disposable-domains list?

Free lists are maintained by hand, so new providers go unlisted until a volunteer spots and adds them. Our feed scores every domain with a model, refreshes daily, and gives you a confidence score to threshold yourself, instead of a single all-or-nothing blocklist. In recent benchmarks, our feed already contained 99.8% of live domains flagged by two or more independent public blocklists. More than 25,000 of the domains we track appear on no public list at all.

Can I check a single email address instead of downloading the list?

Yes. Use the free Disposable Email Checker for instant single lookups, or the Email Verification API to validate addresses in real time at sign-up — including disposable detection, syntax, MX, and mailbox checks.

Is there an API for checking disposable email domains?

Yes. The Email Verification API works as a disposable-email API: it validates any address in real time and flags disposable domains alongside syntax, MX, and mailbox checks. For existing contact lists, the Bulk Email Verification API processes addresses in one pass.

Is this the same as the Free Email Domains Database?

No. The Free Email Domains Database lists domains of free but persistent mailbox providers, such as large webmail services. The Disposable Email Domains Database lists domains of temporary services whose addresses are designed to be abandoned. In recent testing, even a leading competitor classified roughly 30% of known free-webmail domains as disposable, which is why we keep the two databases separate. Many teams use both: one to segment, the other to block.