Is 1under.com a disposable email domain?
No: it is a free consumer mailbox provider.
try:
Declines all mail (null MX)
- mail hosts
- —
- provider
- —
- spf record
- v=spf1 -all
- dmarc policy
- none published
- disposable domain
- no
- free consumer provider
- yes
Is 1under.com disposable?
1under.com is a free consumer mailbox provider, the kind used for personal accounts. Addresses there are legitimate, but they say nothing about the person's company.
About the domain
No working mail server was found for the domain.
How Spaw treats addresses at 1under.com
Because no mail server accepts mail for 1under.com, the API answers undeliverable for every address there without a mailbox probe, and those answers are free: undeliverable verdicts never cost a credit.
More checks for 1under.com
checked 2026-09-03 · sources: live-dns 2026-09-03 · disposable-domains 2026-09-02 · free-provider-domains 2026-09-02
Need this at scale?
The Spaw API runs the same checks plus mailbox-level SMTP verification, batch and bulk endpoints, and list monitoring — 10 free lookups a month, no card required.