Network & IP
Bulk Email Address Validator
Validate a whole list of email addresses at once — syntax plus real mail-server (MX) checks, with a clean pass/fail table and CSV export.
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The Bulk Email Address Validator checks a whole list of email addresses at once, confirming two things for each: that the address is written in a valid format, and that its domain actually has a mail server (MX record) able to receive email. Paste up to 100 addresses, press validate, and get a tidy pass/fail table — plus CSV export — so you can clean a mailing list, signup export or CRM dump in seconds instead of guessing.
This free tool by Hosting Cambodia is made for marketers, sales teams, developers and businesses across Cambodia who send email and want it to land. Removing malformed and undeliverable addresses before you import them protects your sender reputation, lowers bounce rates and saves money on email platforms that charge per contact. It runs entirely from your browser with no sign-up — paste, validate, export.
Frequently asked questions
What does the validator actually check?
Two things per address: correct email syntax, and whether the domain publishes an MX record (or at least an A record) that can accept mail. Addresses that fail either check are flagged.
Does it confirm the mailbox actually exists?
No — verifying an individual mailbox requires an SMTP handshake that most servers block or throttle. This tool confirms the format and that the receiving domain is set up for email, which catches the large majority of bad addresses safely.
Will checking my list affect deliverability?
No. It only performs DNS lookups on the domains, never sends email or contacts the addresses, so there's no risk to your sender reputation.
Can I export the clean list?
Yes — export all results to CSV, then filter to the 'Valid' rows to build your cleaned mailing list.
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