Is inbox.com a valid email domain?
inbox.com has working mail routing: 1 MX record pointing, led by mx.dka.mailcore.net.
It is a free, public mailbox provider, and it is not on our disposable list.
SPF is published and ends with -all. DMARC is set to reject.
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MX records
| Priority | Mail server | Resolves to |
|---|---|---|
| 10 | mx.dka.mailcore.net | 194.19.134.80, 185.138.56.208 |
SPF
Record published
v=spf1 include:spf.mailcore.net include:mail.zendesk.com -all
DMARC
Policy: reject
v=DMARC1; p=reject; adkim=s; aspf=s; fo=1; sp=reject; ruf=mailto:postmaster@inbox.com; rua=mailto:e1d6dbafde954f21aab6915fa1b4b59a@dmarc-reports.cloudflare.net;
Disposable?
No, not on our disposable list.
Free provider?
Yes, a free public mailbox provider.
What this means for your email list
Is a free-provider address a problem?
No: plenty of genuine customers use inbox.com. For business-to-business sales a free address can mean a personal contact instead of a work one, so segment these separately if that matters to you. The address itself still needs checking for typos and dead mailboxes.
Sender authentication
inbox.com has a strict DMARC policy (reject): mail that fails authentication is refused, which protects its brand from spoofing and means anyone sending as inbox.com must have SPF and DKIM set up correctly.
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Sign up to get a report summary →Frequently asked questions
- Is inbox.com a valid email domain?
- Yes. inbox.com publishes 1 MX record and can receive email. Whether a particular mailbox exists is a separate question that only a mailbox check can answer.
- Is inbox.com a disposable email domain?
- No. inbox.com is not on our disposable list, but it is a free public provider. The list is updated regularly, and new throwaway domains appear all the time.
- What are the MX records for inbox.com?
- mx.dka.mailcore.net (priority 10).
- Does inbox.com have SPF and DMARC?
- SPF: yes, ending -all. DMARC: yes, policy reject.