Mailbox provider · Daum (hanmail)
How to verify a hanmail.net email address
Can you verify @hanmail.net addresses?
YesYes. @hanmail.net 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 hanmail.net'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 confirmDaum (hanmail) addresses can be verified without sending an email. On 13 October 2026 the hanmail.net mail server mx1.hanmail.net rejected a made-up recipient at the SMTP RCPT TO step with 550 5.1.1 RUSR: No such user: <…@hanmail.net>, so a mailbox check can tell a missing hanmail.net account from a real one.
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Live DNS snapshot: hanmail.net
Checked 6 November 2026, 11:13 UTCRead from DNS at the time shown and refreshed at most once a day. MX says where mail for hanmail.net goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
- 10
mx3.hanmail.net - 10
mx1.hanmail.net - 10
mx2.hanmail.net - 10
mx4.hanmail.net
v=spf1 include:_spf.daum.net include:_external_smtp.daum.net ~allp=none: meets the requirement, but blocks nothing.
v=DMARC1; p=none; rua=mailto:[email protected]Look up any other domain with the MX lookup or the email provider lookup.
Daum (hanmail) at a glance
| Operated by | Daum Corp. (주식회사 다음), South Korea; the service moved from Kakao to AXZ on 1 December 2025 and AXZ was renamed DaumSource: Daum terms of service (Korean) |
|---|---|
| MX hosts | mx1.hanmail.net, mx2.hanmail.net, mx3.hanmail.netObserved 13 October 2026 (dig MX) |
| Answer to a made-up address | 550 5.1.1 RUSR: No such user: <…@hanmail.net>, returned at RCPT TOObserved 13 October 2026 (SMTP probe of a made-up recipient, no message sent) |
| Address rule | Daum Mail accepts incoming recipients only at @daum.net or @hanmail.net; other recipient domains are bouncedSource: Daum Mail operating policy: sending guide (Korean) |
| Inactive accounts | A Daum Mail account with no access by web, mobile web or IMAP/POP3 for 90 days (3 months) becomes dormant and can no longer receive mail; existing mail is kept and access restores itSource: Daum help: mail dormancy policy (Korean) |
| Postmaster rules | Mail to a dormant Daum account is rejected with 550 5.2.1 RACT … Mailbox is inactive; Daum lists this among its published bounce typesSource: Daum Mail operating policy: bounce types (Korean) |
| Postmaster rules | Daum limits concurrent connections to 100 per IP (for allow-listed IPs) and may block floating IPs and blacklisted IPsSource: Daum Mail operating policy: sending guide (Korean) |
What Daum (hanmail)'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. Daum (hanmail) answered our made-up hanmail.net address with 550 5.1.1 RUSR: No such user: <…@hanmail.net>. 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. Daum (hanmail) rejected ours, so hanmail.net 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.
hanmail.net is Daum's original mail domain; see also daum.net.
Daum and hanmail.net go dormant after 90 days
Daum's help page says an account with no access by web, mobile web or IMAP/POP3 for 90 days becomes dormant. A dormant account keeps its old mail but receives nothing new, and Daum's own list of bounce types shows 550 5.2.1 RACT … Mailbox is inactive for that case. A quiet @hanmail.net address can therefore bounce even though the mailbox once existed.
The same operating policy says Daum only accepts recipients at @daum.net or @hanmail.net, and caps concurrent connections at 100 per IP. Treat RACT bounces as a reason to suppress the address until the person re-engages, and keep your connection counts modest when sending to hanmail.net in bulk.
Cleaning hanmail.net addresses on a list
Because Daum (hanmail) answers honestly, hanmail.net 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 @hanmail.net addresses?
- Yes. @hanmail.net answers mailbox checks one address at a time. The checker opens an SMTP conversation with hanmail.net'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 hanmail.net address exists without emailing it?
- Yes. A verifier connects to Daum (hanmail)'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 hanmail.net address with "550 5.1.1 RUSR: No such user: <…@hanmail.net>", so a missing mailbox shows up as invalid and the owner receives nothing.
- What mail servers does hanmail.net use?
- On 13 October 2026, hanmail.net published these MX hosts: mx1.hanmail.net, mx2.hanmail.net, mx3.hanmail.net. You can look them up yourself with the free MX lookup tool.
- Why did a hanmail.net 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; Daum (hanmail) gave a clear rejection for a missing mailbox when we tested it.
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