Domains looked up
429,532
Can receive mail
40.5%
No longer exist
52.1%
Inconclusive lookups
4.8%

What we measured

Disban keeps an inventory of domains associated with disposable email services, built from public lists, provider inboxes and our own discovery. In the cycle that finished on 8 October 2026 we looked up the mail routing of every one of them: 429,532 domains. A domain counts as able to receive mail when it publishes mail servers (MX records) or, failing that, an address record that mail can fall back to. It counts as unable when the domain does not exist, publishes a null MX record, or has no route at all.

The headline: most of the list is history

223,739 domains (52.1%) no longer exist in DNS at all. Another 11,046 still exist but cannot receive mail: 5,836 publish a null MX record, 4,136 have no mail route, and 1,074 point at mail servers without public addresses. Together that is 234,785 domains (54.7%) that cannot receive a verification email today. Only 174,013 domains (40.5%) can. The remaining 20,734 (4.8%) returned errors or timed out, so we do not count them either way.

Why disposable domain lists rot

Temporary email services register large numbers of cheap domains, use them until signup forms start rejecting them, and let them lapse. A list keeps every domain it has ever seen, so its size measures history, not current activity. A list of 400,000 domains can contain fewer than half that still work. That matters in two directions: list size is not the same as coverage, and a lapsed domain can be registered again by someone else.

Providers behave very differently

The pattern is not uniform. Of the 42,158 domains associated with tempm.com, only 8.4% can still receive mail and 89.6% are dead. For emailfake.com (34,038 domains) 23.5% are alive; for generator.email (14,009) 18.9%. At the other end, 95.9% of temp-mail.org's 2,845 domains still route mail. tempmail.lol, the largest provider in the inventory with 89,508 associated domains, is split almost evenly: 54.0% alive, 46.0% dead. Provider associations come from an imported inventory and are not independently verified; the mail-routing figures are our own lookups.

Which domain endings they use

.com is the most common ending by far, with 155,676 domains (36.2%), followed by .org (28,219), .click (24,039), .net (20,887), .cfd (17,641) and .tk (16,079). Low-cost endings such as .click, .cfd, .tk, .xyz and .site appear often, but they are also used by millions of legitimate sites. Blocking a whole ending would reject real customers and still miss the largest group, which uses .com.

What this means for your signup checks

Check the domain at the moment someone signs up instead of relying on a list snapshot. A domain that no longer exists cannot receive your verification email anyway, so the routing check catches typos and dead domains at the same time. Treat a domain that once appeared on a list but shows no current evidence as unknown rather than disposable, and keep a way to correct mistakes. The disposable domains that matter are the ones that work today.

How Disban uses this data

Every Disban check looks up mail routing live and returns it as a separate field from the category. Domains whose only evidence is an old list entry return unknown with historical_disposable set, so your own policy decides what to do with them. The full method, including how often evidence is renewed, is on the methodology page.

Source for provider behavior: Disban methodology. Product-policy guidance is Disban's interpretation.