Email domain check
Is protonmail.com a disposable email domain?
No: protonmail.com is a free email provider. Here is what that means for your signup form, with mail-server data checked in Oct 2026.
No. protonmail.com is a free email provider with mail handled by Proton. Signups from it are real people, but one person can hold many addresses.
protonmail.com at a glance
| Check | Result |
|---|---|
| Type | Real mailbox provider |
| On the disposable list | No |
| MX records | mail.protonmail.ch, mailsec.protonmail.ch |
| Mail operator | Proton |
| Same inbox as | proton.me |
| Ignores dots in the name | No |
| +tag aliases reach the same inbox | Yes |
| Same mail servers as | proton.me, pm.me |
| Checked | Oct 2026 |
Signups from protonmail.com: real people, repeat trials
protonmail.com is not disposable, so blocking it would turn away genuine customers. The risk is different: the same person signing up again and again to restart a free trial. A +tag (jane+7@protonmail.com) reaches the same inbox as the plain address. protonmail.com is also the same mailbox as proton.me.
Try it in the Gmail alias checker, or see how Vetto flags alias farms on the landing page.
Common typos of protonmail.com
A mistyped domain means the person never receives your welcome email. Vetto catches these and offers a one-click fix to protonmail.com:
rpotonmail.com→protonmail.comportonmail.com→protonmail.comprtoonmail.com→protonmail.comprootnmail.com→protonmail.comprotnomail.com→protonmail.comprotomnail.com→protonmail.com
Test your own in the email typo checker.
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See all 140 domains we checked on the email domain index.
Frequently asked questions
Is protonmail.com a disposable email domain?
No. protonmail.com is a regular mailbox provider (mail handled by Proton). People keep these inboxes for years, so a signup from protonmail.com is a reachable person.
Can one protonmail.com user sign up many times?
Yes, through +tags (jane+2@protonmail.com) or by opening extra accounts. Vetto strips +tags to spot the same inbox signing up again.
Should I allow protonmail.com on a B2B signup form?
Usually yes: founders and freelancers sign up with personal addresses. If you only sell to companies, Vetto's work-email policy can warn or block free providers like protonmail.com without touching anything else.
Give your signup form sharp eyes.
Free on one site. One line of HTML. Remove it any time and your form works exactly as before.
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