ntt.com - Email Domain Verification & Deliverability Report

Active ISP Email Provider
Organization: NTT Communications
Mail Server: Microsoft 365
Verified 7 hours ago

Real-time verification data for ntt.com. View MX records, SPF/DKIM/DMARC authentication, and server deliverability status.

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MX Records for ntt.com

PriorityMail ServerIP Address
10 ntt-com.mail.protection.outlook.com 52.101.124.1
SMTP Status: Responding
SMTP Banner:
220 OS1PEPF0000D210.mail.protection.outlook.com Microsoft ESMTP MAIL Service ready at Tue, 17 Mar 2026 00:11:54 +0000 [08DE808DD700FD67]

ntt.com uses Microsoft 365 mail servers, which means emails are processed through Microsoft 365 infrastructure with their built-in spam filtering and security controls.

Email Authentication for ntt.com

SPF Record Pass

v=spf1 include:spf.protection.outlook.com include:spf01.ntt.com include:spf02.ntt.com include:spf03.ntt.com include:spf04.ntt.com ~all
Authorized Senders:
spf.protection.outlook.com spf01.ntt.com spf02.ntt.com spf03.ntt.com spf04.ntt.com

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

DMARC Record Quarantine

v=DMARC1; p=quarantine; sp=none; rua=mailto:nttcom00001-ra@dmarc25.jp

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

DKIM Found

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

Authentication Summary: ntt.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
ntt.com
TLD
.com
Created
1997-10-07
Updated
2026-02-19
Expires
2031-10-06
Domain Age
28 years

Registrar

Name
Japan Registry Services Co.,Ltd.(JPRS)
IANA ID
1485

Registrant Contact

Name
NTT DOCOMO BUSINESS, Inc.
Location
Chiyoda-ku, Tokyo, JAPAN

Technical Contact

Name
Rikiya Sakuma
Location
Chiyoda-ku, Tokyo, JAPAN

Name Servers

  • ns-os001.ocn.ad.jp
  • pns.ocn.ad.jp

About ntt.com

ntt.com is the domain for NTT Communications, a subsidiary of Nippon Telegraph and Telephone Corporation (NTT), Japan's largest telecommunications company. NTT provides enterprise networking, cloud, and managed services globally.

ntt.com implements SPF and DKIM authentication. NTT maintains enterprise-grade email security.

The mail servers validate recipients and reject invalid addresses. The domain does not operate as catch-all.

For delivery, authenticate with SPF and DKIM.

How to Verify ntt.com Email Addresses

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Use BulkEmailChecker's free email verification tool to instantly validate any ntt.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.

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Verify ntt.com Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates ntt.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, ntt.com is a valid email domain provided by NTT Communications to its internet subscribers. It is a legitimate ISP-issued email address.
No, ntt.com is not a disposable or temporary email provider. It is an ISP-provided email service tied to an internet subscription from NTT Communications.
ntt.com uses mail servers operated by NTT Communications. Check the MX records section above for specific server details and authentication configuration.
Yes, you can send marketing emails to ntt.com addresses with proper opt-in consent. ISP email providers apply spam filtering, and addresses may become inactive if subscribers cancel their internet service. Regular list verification is recommended.
Use BulkEmailChecker to verify ntt.com addresses via SMTP checks. ISP domains may have specific rate limiting or greylisting behaviors. Our tool handles these provider-specific configurations automatically.
The fastest and most accurate way to verify a ntt.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 ntt.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 ntt.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 ntt.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 ntt.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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