Check Korean Naver Email Addresses in Bulk (naver.com, Free)
Got Korean signups in a spreadsheet? The bulk Naver email checker flags syntax, duplicates and dead domains for the whole list, then asks Naver's server about the first 10 mailboxes. Sign in with Google for the free checks on the rest.
Naver rejected made-up addresses with 550 5.1.1 No such user. on 12 October and 8 November 2026, so a missing naver.com mailbox comes back invalid.
What the server says
On 8 November 2026 naver.com published mx1.mail.naver.com, then mx4, mx5 and mx6.mail.naver.com, as its MX hosts. On 12 October it answered a made-up address at RCPT TO with 550 5.1.1 No such user., and a fresh one was rejected the same way on 8 November. A rejected row is a hard bounce.
A valid address is not a consenting one
Naver's spam policy (Korean) says bulk mail sent without the recipients' consent is treated as spam even if it otherwise follows the rules. It also requires commercial mail to show '광고' (advertisement) in the subject and body and to explain how to opt out. Verifying the list fixes the addresses; the consent records are yours to keep.
The by-hand way
- Filter the sheet to naver.com.
- Remove repeats and typos.
- Test addresses one at a time with the Naver email checker.
In the tool
Paste the list or a CSV column, read the flags for typo domains, duplicates, +tag repeats and dead domains, download the clean list, and let the first 10 reach Naver for a live answer. Other rows are checked as normal addresses and marked.
What this check cannot do
- Naver doesn't publish how its servers answer mailbox checks; the handling is from our own checks, which can change.
- It can't tell whether anyone agreed to your mail.
- A +tag repeat is marked as possibly the same inbox, not merged.
- Valid means the mailbox exists today, not that anyone reads it.
Next: the whole list
The verify page on simpleverifier.com takes any list size: the first 100 checks are free with a Google sign-in, no card.
Try it now
Paste your list into the bulk Naver email checker.
Common questions
Can you check Naver addresses in bulk?
Yes. Naver's server rejected made-up addresses with 550 5.1.1 No such user on 12 October and 8 November 2026, so a missing mailbox comes back invalid. The first 10 are asked live; sign in with Google for the rest.
Does a valid result mean the person agreed to my email?
No. Naver's spam policy treats bulk mail sent without the recipients' consent as spam, so consent is a separate question from validity.
What does Naver require on commercial mail?
Its spam policy requires commercial mail to show '광고' (advertisement) in the subject and body and to explain how to opt out.
Are daum.net and hanmail.net Naver rows?
No. Only naver.com counts; Daum and Hanmail rows are checked as normal addresses and marked as another provider.
Will the owners know I checked?
No. The check ends after the mail server answers about the mailbox, before any message content is sent.
Check your list before you send
Real mailbox checks over SMTP, and nothing is sent to the address. Sign in with Google and your first 100 email checks are free, no card. Plans for bigger lists are on the pricing page.