inbox.com - Email Domain Verification & Deliverability Report

Active Free Email Provider
Organization: Inbox.com Inc.
Mail Server: mailcore.net
Verified 1 days ago

Real-time verification data for Inbox.com Inc. (inbox.com). A Free Email Provider .

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MX Records for inbox.com

PriorityMail ServerIP Address
10 mx.dka.mailcore.net 185.138.56.208
SMTP Status: Responding
SMTP Banner:
220 MX.DKA.mailcore.net (DKA-EDGE11) ready

inbox.com uses mailcore.net mail servers, which means emails are processed through mailcore.net infrastructure with their built-in spam filtering and security controls.

Email Authentication for inbox.com

SPF Record Pass

v=spf1 include:spf.mailcore.net include:mail.zendesk.com include:sendgrid.net -all
Authorized Senders:
spf.mailcore.net mail.zendesk.com sendgrid.net

SPF (Sender Policy Framework) specifies which mail servers are authorized to send email on behalf of inbox.com.

DMARC Record 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;

DMARC (Domain-based Message Authentication) tells receiving servers what to do with emails that fail authentication checks.

DKIM Found

DKIM signatures were detected for inbox.com, confirming that this domain cryptographically signs outgoing emails.

Authentication Summary: inbox.com has full email authentication configured with SPF, DMARC, and DKIM. This provides strong protection against email spoofing and phishing. Emails sent from this domain are well-authenticated and likely to have high deliverability.

WHOIS & Domain Information

Registration Details

Domain
inbox.com
TLD
.com
Created
1995-04-16
Updated
2026-03-17
Expires
2028-04-17
Domain Age
30 years

Registrar

Name
Domeneshop AS dba domainnameshop.com
IANA ID
1001

Registrant Contact

Organization
INBOX.COM AS
Location
NORWAY

Technical Contact

Location
NORWAY

Name Servers

  • SAGE.NS.CLOUDFLARE.COM
  • VERONICA.NS.CLOUDFLARE.COM

About inbox.com Email Verification

inbox.com is a free email service from Inbox.com Inc., offering webmail with large storage, spam filtering, and mobile access for users seeking a simple email experience.

inbox.com supports SPF authentication for outbound email. The platform applies anti-spam filtering and basic security measures.

The inbox.com mail servers validate recipients and reject invalid mailboxes. The domain does not operate in catch-all mode. Rate limiting applies for unknown senders.

When emailing inbox.com users, ensure valid SPF records. Maintain clean lists and follow standard deliverability practices.

How to Verify inbox.com Email Addresses

Need to check if an email address at inbox.com actually exists before you send to it? BulkEmailChecker performs deep SMTP-level validation, connecting directly to inbox.com's mail servers to confirm the mailbox is real, active, and able to receive your message. No test email is ever sent, so your sender reputation stays protected.

Verify a Single inbox.com Email
Use BulkEmailChecker's free email verification tool to instantly validate any inbox.com address. You'll get a complete deliverability report including mailbox existence, catch-all detection, disposable domain flagging, and risk scoring, all in under 3 seconds.

Verify a List of inbox.com Emails in Bulk
Have a mailing list full of inbox.com addresses? Upload your CSV or TXT file to BulkEmailChecker and verify thousands of email addresses in minutes. Our bulk verification engine runs 30+ checks per address including syntax validation, DNS resolution, SMTP handshake, and spam trap detection. Clean your list before every campaign to keep bounce rates below 2% and protect your sender score. See bulk pricing.

Verify inbox.com Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates inbox.com email addresses at the point of entry, blocking invalid, disposable, and risky addresses before they enter your database. Integrate with a single API call and prevent bad data at the source.

Frequently Asked Questions

Yes, inbox.com is a valid email domain operated by Inbox.com Inc. It provides free email accounts with a focus on simplicity and ad-free experience for premium users.
No, inbox.com is not a disposable email provider. It is a permanent free email service offering full-featured email accounts for personal use.
Inbox.com operates its own mail servers. MX records point to Inbox.com's mail infrastructure for handling inbound email delivery.
Yes, with proper opt-in consent. Inbox.com uses standard spam filtering. Ensure proper email authentication to maintain deliverability to inbox.com users.
Inbox.com addresses can be verified via SMTP checks. The service returns responses for valid and invalid addresses, allowing reliable email verification.
The fastest and most accurate way to verify a inbox.com email address is to use BulkEmailChecker's free email verification tool. Simply enter the full email address and our system performs SMTP-level validation by connecting directly to inbox.com's mail servers. You'll get instant results showing whether the mailbox exists, is deliverable, and is safe to send to, all without sending a single email.
Yes. BulkEmailChecker uses SMTP verification to check if a inbox.com mailbox exists without ever delivering an email. Our system connects to the domain's mail server, performs an SMTP handshake, and queries the mail server to confirm whether the recipient address is valid. This process is completely invisible to the email recipient and does not affect your sender reputation.
Sending to invalid email addresses causes hard bounces, which directly damage your sender reputation. Internet Service Providers (ISPs) and email providers track your bounce rate, and if it exceeds 2%, your emails may start landing in spam folders or get blocked entirely. Verifying inbox.com addresses with BulkEmailChecker before sending prevents bounces and keeps your deliverability high.
BulkEmailChecker's bulk verification service lets you upload a CSV or TXT file containing thousands of inbox.com email addresses and verify them all at once. Each address goes through 30+ verification checks including syntax validation, DNS/MX lookup, SMTP verification, disposable domain detection, and spam trap identification. Results are typically ready within minutes and can be downloaded as a clean, verified list.
Email verification is the process of confirming that an email address is real, properly formatted, and capable of receiving messages. It matters because sending to invalid addresses causes bounces, damages your sender reputation, wastes marketing budget, and can get your sending IP blacklisted. BulkEmailChecker verifies addresses at the SMTP level, the most accurate method available, ensuring your emails reach real people.
MX (Mail Exchange) records are DNS entries that specify which mail servers are responsible for receiving email for a domain. When you send an email, your mail server looks up the recipient domain's MX records to find where to deliver the message. If a domain has no MX records, it cannot receive email. BulkEmailChecker checks MX records as part of every verification to confirm the domain is configured for email delivery.
A catch-all (or accept-all) domain is configured to accept email sent to any address at that domain, regardless of whether the specific mailbox exists. This makes it harder to verify individual addresses because the server always responds positively. BulkEmailChecker detects catch-all configurations and flags them in verification results so you can make informed decisions about sending to those addresses.
Yes. BulkEmailChecker offers a real-time email verification API that you can integrate into signup forms, CRM systems, lead capture tools, and any application that collects email addresses. The API validates addresses at the point of entry, blocking invalid, disposable, and risky emails before they enter your database. Integration takes just a single API call with response times under 3 seconds.

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