Mailbox provider · mail.de
How to verify a mail.de email address
Can you verify @mail.de addresses?
YesYes. @mail.de 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 mail.de'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 confirmmail.de addresses can be verified without sending an email. On 13 October 2026 the mail.de mail server mx01.mail.de rejected a made-up recipient at the SMTP RCPT TO step with 550 Recipient does not exist, so a mailbox check can tell a missing mail.de account from a real one.
Price: this tool is free. Checking a whole email list is from $9/mo, and the first 100 checks are free with Google, no card. See pricing
Live DNS snapshot: mail.de
Checked 6 November 2026, 11:11 UTCRead from DNS at the time shown and refreshed at most once a day. MX says where mail for mail.de goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
- 10
mx01.mail.de - 10
mx02.mail.de
v=spf1 ip4:62.201.172.0/27 ip4:62.201.172.32/27 ip6:2001:0868:0100:0600::/64 ip4:194.113.42.0/26 ip6:2a0f:f640::/56 ~allp=quarantine: meets the requirement and enforces it.
v=DMARC1; p=quarantine; rua=mailto:[email protected]Look up any other domain with the MX lookup or the email provider lookup.
mail.de at a glance
| Operated by | mail.de GmbH, Gütersloh, GermanySource: mail.de imprint (German) |
|---|---|
| MX hosts | mx01.mail.de, mx02.mail.deObserved 13 October 2026 (dig MX) |
| Answer to a made-up address | 550 Recipient does not exist, returned at RCPT TOObserved 13 October 2026 (SMTP probe of a made-up recipient, no message sent) |
| Inactive accounts | mail.de may block access to a free account that the customer has not actively used for more than 180 days in a rowSource: mail.de terms, section 8.4 (German) |
| Inactive accounts | When a contract ends, all data, settings and access details of the cancelled products are deletedSource: mail.de terms, section 8.5 (German) |
What mail.de'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. mail.de answered our made-up mail.de address with 550 Recipient does not exist. 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. mail.de rejected ours, so mail.de 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.
mail.de can block free accounts unused for 180 days
Section 8.4 of the mail.de terms lets the company block access to a free account that has not been actively used for more than 180 days in a row. Section 8.5 says all data and settings are deleted once a contract ends. An unused @mail.de address can therefore stop working.
Remove @mail.de contacts that bounce and re-confirm those you have not heard from in six months.
Cleaning mail.de addresses on a list
Because mail.de answers honestly, mail.de 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 @mail.de addresses?
- Yes. @mail.de answers mailbox checks one address at a time. The checker opens an SMTP conversation with mail.de'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 mail.de address exists without emailing it?
- Yes. A verifier connects to mail.de'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 mail.de address with "550 Recipient does not exist", so a missing mailbox shows up as invalid and the owner receives nothing.
- What mail servers does mail.de use?
- On 13 October 2026, mail.de published these MX hosts: mx01.mail.de, mx02.mail.de. You can look them up yourself with the free MX lookup tool.
- Why did a mail.de 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; mail.de gave a clear rejection for a missing mailbox when we tested it.
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