Is 33mail.comdisposable?
No, private relay
33mail.com is a private email relay from 33Mail. It forwards mail to someone's real inbox, so there's a person behind it. We don't treat it as disposable, even when an open list does.

Why we say this
How the data is built, and what it can’t tell you.
33mail.com is on our list of private email relays, each taken from the service's own pages. A relay is never disposable, so no list changes this answer.
Mail servers (MX)
Checked Nov 5, 2026.

aspmx.l.google.com
alt2.aspmx.l.google.com
alt1.aspmx.l.google.com
aspmx3.googlemail.com
aspmx2.googlemail.com
aspmx4.googlemail.com
aspmx5.googlemail.comRegular email providers

Get an API key
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Checks: format, mail server (MX), disposable domains and role addresses (admin@, info@).