API waitlist

Is outlook.comdisposable?

No

outlook.com is a mainstream email provider and isn't on the disposable-domain blocklist.

Clerks at long desks in the Dead Letter Office, its name painted on the back wall
The Dead Letter Office. Mail that could not be delivered was sorted here.

Mail servers (MX)

Checked Nov 5, 2026.

A clerk at a desk covered in stacks of envelopes
Clara Nelson of the Dead Letter Office, 1916.
outlook-com.olc.protection.outlook.com

Other email providers

Undelivered parcels, crates and tyres piled in a storeroom
Undelivered parcels at the Dead Letter Office, 1922.

API waitlist

Join the waitlist for early access.

Block disposable signups with one API call (coming soon).

Planned checks: format, mail server (MX), disposable domains and role addresses (admin@, info@).