Disposable Email Checker
Find out whether an address comes from a throwaway inbox service. Each entry is compared with a curated list of disposable email domains, and the domain's mail servers are examined as well, which catches alias domains that point to the same services.
- Encrypted connection
- No sign-up
- Free to use
How to use Disposable Email Checker
- Enter email addresses or bare domains, one per line, up to twenty.
- Select Check.
- Read the label beside each entry: Disposable, Disposable mail servers, Not on the list or Cannot receive mail.
- Open an entry to see the reason and the mail servers that were found.
Disposable Email Checker features
Domain list matching
Compares the domain and its parent domains with a curated list of temporary mailbox services.
Mail server matching
Looks up MX records and flags domains whose mail is handled by a known disposable service.
Bulk checking
Up to twenty addresses or domains in one run, with a summary.
Deliverability hint
Tells you when a domain has no mail servers at all.
Transparent result
Every verdict states which rule matched, so you can judge it yourself.
Nothing stored
Entries are used for the check and discarded.
When to use Disposable Email Checker
- Reviewing sign-ups for a free trial that is being abused with throwaway accounts.
- Checking a suspicious order or contact request.
- Testing whether your own form's disposable-email filter agrees with an independent list.
- Cleaning a small mailing list before a campaign.
Disposable Email Checker FAQ
What is a disposable email address?
An address at a service that hands out inboxes without registration, usually for minutes or hours. Anyone can read mail sent to it, and it disappears afterwards. People use such addresses to avoid giving their real one, which is reasonable for privacy but also popular for abusing free trials and sign-up bonuses.
How reliable is the detection?
A match is reliable: the domain or its mail servers belong to a known service. The absence of a match is weaker evidence. New disposable domains are created every day, and no list contains all of them, so treat “Not on the list” as “no evidence found”.
What does “Disposable mail servers” mean?
Disposable services often register many domain names that all deliver to the same servers. If a domain is not on the list but its MX records point to such a service, it is almost certainly one of these aliases.
Are Gmail plus addresses or forwarding aliases disposable?
No. Addresses like name+shop@gmail.com, and alias services that forward to a real mailbox, belong to a person who keeps receiving the mail. They are not treated as disposable here.
Should I block disposable addresses on my site?
It depends on the cost of a throwaway sign-up. Blocking them reduces abuse of free tiers and improves list quality, but it also turns away privacy-conscious people. A softer approach is to allow the sign-up and require a confirmed email before granting anything of value.
Can I check a whole domain instead of an address?
Yes. Enter just the domain. Only the part after the @ sign matters for this check, because disposability is a property of the mail service, not of an individual address.
How disposable addresses are recognised
Temporary inbox services are easy to use precisely because they have no accounts: you pick or receive a random address and read whatever arrives. For the owner of a website this creates a blind spot. A sign-up with such an address can be confirmed, yet nobody will read later messages, password resets go nowhere, and one person can create accounts without limit.
The first line of detection is a list of domains known to belong to these services. It works well for the established names, which have used the same domains for years. Services respond by adding fresh domains regularly, and some let users bring their own, so a list always trails reality.
The second line is the mail infrastructure. However many domains a service owns, the mail has to be delivered somewhere, and it usually ends up on the same small set of servers. Checking a domain's MX records against the servers of known services exposes many alias domains that no list has caught yet. This checker applies both methods and tells you which one produced the verdict.
Neither method reads minds. A real person may prefer a temporary address for a one-off download, and a determined abuser can use ordinary free mailboxes. Use the result as one input among others, such as whether the email has been confirmed and how the account behaves afterwards.