How Many Email Generator Domains Actually Work?
An email generator is only as good as its domains. The name before the @ is the easy part — anyone can make one up. The part after it decides whether a sign-up form accepts the address and whether the code actually arrives. Here is how many domains in our email generator work at the moment, how quickly the pool renews itself, and how to use that when an address gets refused.
Numbers are rounded on purpose and update by themselves several times a day. The exact size of the pool isn't something we publish — the shape of it is. We started counting on 27 September 2026, so the charts begin there.
How many domains are active
A domain counts as active only while it actually accepts mail — being in a list is not enough. The dark line is the total, day by day. The coloured lines split it into whole domains, single subdomains, and wildcard domains, where you can make up the subdomain as well as the name. Hover over (or tap) the chart to see all numbers for that day.
all active whole domains single subdomains any subdomain works
Arrivals and departures
Green is how many domains joined, red is how many stopped — shown per day for each month, so a month that has only just started compares fairly with a full one. The number under each month is how many domains were active in total at the end of that month (for the current month — today).
joined stopped 4.3k — active in total (4.3k ≈ 4,300)
The most common zones
The ending of a domain — .com, .net and so on — is its zone. These are the ten most common among active domains right now; everything else is grouped as “other”.
Whole domains and subdomains
whole domains single subdomains
About 67% of active domains work as a whole domain; the rest are a single subdomain of someone else's domain. Whole domains usually last longer: a subdomain depends on more people, and the owner of the parent domain can change things without warning. And on roughly 12% of them any name in front of the domain works too — see wildcard domains.
Why email generator domains stop working
Every domain in the pool belongs to someone, and it works only while its owner keeps it pointed at the generator. When a domain drops out, it is almost always one of these:
| What happened | What you notice |
|---|---|
| The registration ran out and nobody renewed it | the domain disappears from the list |
| The owner moved the domain's mail somewhere else | new messages stop arriving at addresses on it |
| A parent domain changed its settings (for subdomains) | one subdomain stops, its neighbours keep working |
| Popular sites started refusing the domain | the address works, but some sign-up forms reject it |
The first three remove a domain from the pool, so it stops being offered. The last one is different: the domain still receives mail, but some services refuse it at the sign-up form. That is why a domain can work for one site and not for another on the same day.
Why new domains keep joining
Domain owners point their own domains at the email generator — some to get a private inbox nobody else uses, others to put a spare domain to work. Each one joins the pool once its mail starts arriving. That steady supply is what keeps the list fresh: a domain that joined recently has had less time to end up on anyone's block-list. You can do the same with a domain of your own — here's how.
Does the zone matter?
For receiving mail, no: an address on .com and one on a rarer ending work the same way here. For being accepted, it sometimes does. Strict sign-up forms are more suspicious of unusual endings, and an address on a familiar zone looks more like an everyday mailbox. If a form keeps refusing addresses, try a domain on one of the most common zones in the list above before anything else.
What this means for you
- A refused address isn't the end. Try one on a different domain — not just a different name on the same one. With this many domains in rotation, another usually works.
- Fresh beats familiar. A domain that joined recently has had less time to end up on anyone's block-list.
- No code arriving? Give it a minute, then switch domains — here's the full checklist.
- Want a domain nobody else uses? Add your own — it joins the pool the same way all of these did.
Frequently asked questions
How many domains does the email generator have?
Roughly 4,300 receive mail right now. The number changes every day as domains join and drop out, which is why this page shows it as a chart rather than a single figure.
Why did the domain I used last week disappear?
Most likely its owner let it expire or moved its mail elsewhere. Messages sent to it after that are not delivered here. Use a domain that is in the list today.
Is a new domain better than an old one?
For sign-ups, often yes. Block-lists are built over time, so a domain that joined recently is less likely to be on one. For receiving mail, there is no difference.
Can I get the full list of domains?
No — and that is deliberate. A ready-made list is most useful to whoever builds the block-lists that make sign-up forms refuse generated addresses. Publishing it would make every domain on it worse for you.
Is an address on a subdomain less reliable?
Slightly, on average: a subdomain depends on its own settings and on those of the parent domain. It is still a full mailbox — see subdomain email addresses for when it is worth using.