What does "Disposable" mean and where does the list come from?

Disposable in the Valid Email Checker enum (disposable) means the domain is a known temporary-mail service. Mailinator, 10MinuteMail, GuerrillaMail, Yopmail, Trashmail, EmailOnDeck, Maildrop, plus the long tail of less-famous throwaway providers all fall under this label. Step 7 of the 11-step engine handles detection.

Disposable is a definitive status, separate from risky and unknown. The engine is confident the domain provides one-shot inboxes that the user has no intention of monitoring after the initial signup confirmation. The confidence score lands around 30, clearly negative but distinct from Spam Trap (3) which carries active reputation risk.

Where the underlying list comes from

Detection works against a large list of disposable-mail domains maintained by our verification providers. The list combines three sources, refreshed on a rolling basis:

• Public open-source disposable-email lists (the well-known GitHub repositories that catalog throwaway services) form the baseline. These are useful but not enough on their own because new providers spin up faster than the public lists update.
• Provider-internal abuse signals. When our verification providers see high volumes of low-engagement signups from a new domain, that domain gets flagged and added to the disposable set.
• Domain-pattern heuristics catch services that use rotating subdomains. GuerrillaMail famously rotates dozens of subdomain variations; the detection logic recognises the pattern, not just specific subdomain entries.

The full list reaches into the thousands and grows steadily. The marketing-site signup flow uses the same database to reject disposable addresses at registration — see why was my signup rejected with disposable email for the full sign-up flow.

How often the list updates

Updates run continuously on the provider side. New disposable services pop up most weeks; the providers add them as they appear. From the customer side, you do not have to do anything to benefit — your verification calls use the live list at the moment of the call, not a frozen snapshot.

False positives are rare but they do happen. If a legitimate small-business domain ends up on a disposable list incorrectly (usually because of suspicious activity at the domain that was unrelated to email), contact support with the domain and we will work with the provider to remove it.

Disposable versus Catch-All versus Spam Trap

Three statuses that newcomers mix up. Disposable means the user owns the inbox temporarily and will abandon it. Catch-all means the domain accepts mail to any address whether the mailbox is real or not. Spam trap means the address exists to catch senders with poor list hygiene. The three carry different risk profiles, so the engine reports them as separate statuses rather than collapsing into a generic "bad" label.

For the full status reference see result types explained.