Mailbox provider · Tuta (Tutanota)
How to verify a tutanota.com email address
Can you verify @tutanota.com addresses?
YesYes. @tutanota.com answers mailbox checks one address at a time.
Check one address
Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.
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The checker opens an SMTP conversation with tutanota.com's mail server, offers a random address first to rule out a catch-all, then names your address at RCPT TO and disconnects without sending. A rejection comes back invalid ("Mailbox not found") and an acceptance valid ("Mailbox exists"). Temporary replies come back risky. It always checks the syntax, the domain's MX records, disposable domains and role addresses such as info@ first.
Mailbox existsMailbox not foundServer would not confirmTuta (Tutanota) addresses can be verified without sending an email. On 13 October 2026 the tutanota.com mail server mail.tutanota.de rejected a made-up recipient at the SMTP RCPT TO step with 550 5.7.1 <…@tutanota.com>: Recipient address rejected: Mailbox not found, so a mailbox check can tell a missing tutanota.com account from a real one.
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Live DNS snapshot: tutanota.com
Checked 6 November 2026, 12:12 UTCRead from DNS at the time shown and refreshed at most once a day. MX says where mail for tutanota.com goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
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mail.tutanota.de
v=spf1 include:spf.tutanota.de -allp=quarantine: meets the requirement and enforces it. No rua= address, so you get no aggregate reports.
v=DMARC1; p=quarantine; adkim=sLook up any other domain with the MX lookup or the email provider lookup.
Tuta (Tutanota) at a glance
| Operated by | Tutao GmbH, Hanover, Germany (brand: Tuta)Source: Tuta legal notice |
|---|---|
| MX hosts | mail.tutanota.deObserved 13 October 2026 (dig MX) |
| Answer to a made-up address | 550 5.7.1 <…@tutanota.com>: Recipient address rejected: Mailbox not found, returned at RCPT TOObserved 13 October 2026 (SMTP probe of a made-up recipient, no message sent) |
| Address rule | Tuta offers the domains tuta.com, tutanota.com, tutanota.de, tutamail.com, tuta.io and keemail.me for addressesSource: Tuta blog: anonymous email |
| Inactive accounts | Free accounts are deleted if there is no login for more than six months; deleted Tuta addresses are not recycled and stay blocked for new registrationsSource: Tuta support FAQ |
| Inactive accounts | Tutao may terminate a free-tariff contract without notice if the account was not used for at least six monthsSource: Tuta terms, section 5.6 |
What Tuta (Tutanota)'s server says about a missing mailbox
The reply that matters is the one to RCPT TO, the step where the checking server names the recipient. Tuta (Tutanota) answered our made-up tutanota.com address with 550 5.7.1 <…@tutanota.com>: Recipient address rejected: Mailbox not found. A 5xx code at that step is a permanent "no such mailbox", which is the same answer a real message would get, so SimpleVerifier marks the address invalid with the reason "Mailbox not found". A 250 at the same step means the mailbox exists and comes back valid.
Before trusting a "valid", a careful verifier also offers a random address that cannot exist. Tuta (Tutanota) rejected ours, so tutanota.com is not a catch-all: a 250 for your address is a real signal. Temporary 4xx replies (421, 450, 451) are about the connection, not the mailbox, and come back risky with "Server would not confirm" rather than invalid. Hard bounce vs soft bounce explains why that split matters.
Tuta encrypts stored mail, but it still tells a connecting server at RCPT TO whether a mailbox exists.
Tuta deletes free accounts after six months without login
Tuta's support FAQ says free accounts are deleted after more than six months without a login, and the terms allow ending an unused free account. Tuta says it does not recycle addresses, so a deleted @tutanota.com address stays blocked for new sign-ups. It should not end up with a stranger.
Tuta lists six domains: tuta.com, tutanota.com, tutanota.de, tutamail.com, tuta.io and keemail.me. They are choices on one service, so one person may hold addresses under several. Remove addresses that bounce and re-confirm old contacts.
Cleaning tutanota.com addresses on a list
Because Tuta (Tutanota) answers honestly, tutanota.com is one of the domains where verification removes bounces before they happen. Drop the invalid results, keep the valid ones, and re-check the risky ones later: a temporary reply on one day often turns into a clear answer the next.
A valid result only means the mailbox exists today. Addresses on an old consumer list go stale as people stop using them, so re-verify before each large send to an aged segment; how often to verify an email list gives a schedule. Upload the CSV to the verifier and download the valid, risky and invalid rows as separate files.
Common questions
- Can you verify @tutanota.com addresses?
- Yes. @tutanota.com answers mailbox checks one address at a time. The checker opens an SMTP conversation with tutanota.com's mail server, offers a random address first to rule out a catch-all, then names your address at RCPT TO and disconnects without sending. A rejection comes back invalid ("Mailbox not found") and an acceptance valid ("Mailbox exists"). Temporary replies come back risky. It always checks the syntax, the domain's MX records, disposable domains and role addresses such as info@ first.
- Can I check if a tutanota.com address exists without emailing it?
- Yes. A verifier connects to Tuta (Tutanota)'s mail server, names the address at the RCPT TO step and disconnects before sending. On 13 October 2026 the server rejected a made-up tutanota.com address with "550 5.7.1 <…@tutanota.com>: Recipient address rejected: Mailbox not found", so a missing mailbox shows up as invalid and the owner receives nothing.
- What mail servers does tutanota.com use?
- On 13 October 2026, tutanota.com published these MX hosts: mail.tutanota.de. You can look them up yourself with the free MX lookup tool.
- Why did a tutanota.com address come back risky instead of invalid?
- Risky means the server didn't give a permanent answer during the check, usually a temporary 4xx reply or a timeout. It isn't proof the address is bad. Check it again later; Tuta (Tutanota) gave a clear rejection for a missing mailbox when we tested it.
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