Identify temporary, throwaway email addresses in your lists, see why they hurt engagement, and read how Kawaa flags them in a result.
What are disposable emails?
Disposable (or temporary) email addresses are created for short-term use and typically expire after a set period. Users often use them to avoid spam or bypass registration requirements.
Why block disposable emails?
- Low engagement - Users rarely check these addresses
- High bounce rates - Addresses often expire quickly
- Fraud risk - Commonly used for fraudulent sign-ups
- Wasted resources - Marketing to disposable addresses has no ROI
Detection methods
Kawaa matches the domain against a curated list of known disposable providers, including:
- Guerrilla Mail
- 10 Minute Mail
- Temp Mail
- Mailinator
Disposable providers register new throwaway domains constantly, so list matching alone always lags. With AI analysis on, a domain that is not on the list is also judged by its name. A name that looks like a throwaway service sets data.flags.disposable, but only a listed domain gets the disposable status: an address at a real company whose name happens to contain a word like burner or temp is still checked with its mail server. A misspelling of a big mailbox provider, such as gmial.com, is reported as a likely typo with a suggested correction, not as disposable.
API response
An address at a listed domain gets its own top-level status of disposable, and data.flags.disposable is set. The domain normally has working MX records, so verification still reports the address as reachable. It is the throwaway nature of the mailbox, not a delivery failure, that makes it low quality.
{
"success": true,
"data": {
"email": "testuser@mailinator.com",
"status": "disposable",
"quality_score": 15,
"verification": {
"syntax_valid": true,
"domain_exists": true,
"mx_found": true,
"greylisted": false
},
"flags": {
"disposable": true,
"role_account": false,
"free_provider": false
}
}
}