Mailbox provider · freenet Mail
How to verify a freenet.de email address
Can you verify @freenet.de addresses?
YesYes. @freenet.de answers mailbox checks one address at a time.
Check one address
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The checker opens an SMTP conversation with freenet.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 confirmfreenet Mail addresses can be verified without sending an email. On 13 October 2026 the freenet.de mail server mx.freenet.de rejected a made-up recipient at the SMTP RCPT TO step with 550 unrouteable address, so a mailbox check can tell a missing freenet.de account from a real one.
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Live DNS snapshot: freenet.de
Checked 6 November 2026, 10:06 UTCRead from DNS at the time shown and refreshed at most once a day. MX says where mail for freenet.de goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
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mx.freenet.de
v=spf1 redirect=_spf.freenet.dep=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.
freenet Mail at a glance
| Operated by | freenet.de GmbH, Hamburg, Germany (a freenet Group company)Source: freenet Mail imprint (German) |
|---|---|
| MX hosts | mx.freenet.deObserved 13 October 2026 (dig MX) |
| Answer to a made-up address | 550 unrouteable address, returned at RCPT TOObserved 13 October 2026 (SMTP probe of a made-up recipient, no message sent) |
| Inactive accounts | After 180 days without activity all messages and attachments are removed; with no login for 365 days the whole mailbox is deleted and the address can be registered again by othersSource: freenet Mail help article on login problems (German) |
| Inactive accounts | Free accounts keep messages in inbox and outbox for 90 days by default, then they are deleted automaticallySource: freenet customer service FAQ (German) |
| Postmaster rules | freenet may refuse to accept or deliver mail that an automated check rates as likely bulk spam, without telling the userSource: freenet terms, section 4.2.2 (German) |
What freenet Mail'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. freenet Mail answered our made-up freenet.de address with 550 unrouteable address. 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. freenet Mail rejected ours, so freenet.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.
"Unrouteable address" is the wording the Exim mail server uses when it has nowhere to deliver a recipient. Coming at RCPT TO on freenet's own domain, it means there is no such mailbox.
freenet Mail deletes unused mailboxes after 365 days
A freenet Mail help article says all messages are removed after 180 days without activity, and the whole mailbox is deleted after 365 days without a login. The address can then be registered by others. The customer FAQ adds that free accounts keep mail for only 90 days by default.
Under section 4.2.2 of the freenet terms, freenet may refuse mail that an automated check rates as likely bulk spam. Remove old @freenet.de contacts that bounce and re-confirm the rest.
Cleaning freenet.de addresses on a list
Because freenet Mail answers honestly, freenet.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 @freenet.de addresses?
- Yes. @freenet.de answers mailbox checks one address at a time. The checker opens an SMTP conversation with freenet.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 freenet.de address exists without emailing it?
- Yes. A verifier connects to freenet Mail'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 freenet.de address with "550 unrouteable address", so a missing mailbox shows up as invalid and the owner receives nothing.
- What mail servers does freenet.de use?
- On 13 October 2026, freenet.de published these MX hosts: mx.freenet.de. You can look them up yourself with the free MX lookup tool.
- Why did a freenet.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; freenet Mail gave a clear rejection for a missing mailbox when we tested it.
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