gmx.us - Email Domain Verification & Deliverability Report

Active Free Email Provider
Organization: 1&1 Mail & Media
Mail Server: gmx.net
Verified 5 days ago

Real-time verification data for 1&1 Mail & Media (gmx.us). A Free Email Provider .

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MX Records for gmx.us

PriorityMail ServerIP Address
10 mx00.gmx.net 212.227.15.10
20 mx01.gmx.net 212.227.17.4
SMTP Status: Responding
SMTP Banner:
220 gmx.net (mxgmx006) Nemesis ESMTP Service ready

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

Email Authentication for gmx.us

SPF Record Pass

v=spf1 redirect=_spf.gmx.net

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

DMARC Record Quarantine

v=DMARC1; p=quarantine; rua=mailto:dmarcreport@gmx.net

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

DKIM Not Detected

DKIM detection is limited from external scanning. The domain may use DKIM with selectors not covered by our scan.

Authentication Summary: gmx.us has SPF and DMARC configured. This provides good protection against email spoofing. Senders can expect reliable email delivery to this domain.

WHOIS & Domain Information

Registration Details

Domain
gmx.us
TLD
.us
Created
2002-04-24
Updated
2025-06-12
Expires
2026-04-01
Domain Age
23 years

Registrar

Name
InternetX GmbH
IANA ID
151

Registrant Contact

Name
REDACTED FOR PRIVACY
Organization
1&1 Mail & Media GmbH
Location
REDACTED FOR PRIVACY, DE, GERMANY

Technical Contact

Name
REDACTED FOR PRIVACY
Organization
REDACTED FOR PRIVACY
Location
REDACTED FOR PRIVACY, REDACTED FOR PRIVACY, UNITED STATES

Name Servers

  • ns-mam.ui-dns.com
  • ns-mam.ui-dns.biz
  • ns-mam.ui-dns.org
  • ns-mam.ui-dns.de

About gmx.us Email Verification

gmx.us is the United States variant of GMX Mail from 1&1 Mail and Media GmbH. This domain serves American users with the same GMX platform features including large storage, attachment support, and cloud integration.

gmx.us uses the same authentication as other GMX domains with SPF, DKIM, and DMARC. The service complies with the CAN-SPAM Act and applies consistent anti-spam filtering.

The gmx.us mail servers enforce recipient verification and reject nonexistent addresses. The domain does not operate as catch-all. Uniform rate limiting applies across all GMX regional domains.

For delivery to gmx.us, maintain full email authentication with SPF, DKIM, and DMARC. Comply with CAN-SPAM requirements for commercial messages.

How to Verify gmx.us Email Addresses

Need to check if an email address at gmx.us actually exists before you send to it? BulkEmailChecker performs deep SMTP-level validation, connecting directly to gmx.us'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 gmx.us Email
Use BulkEmailChecker's free email verification tool to instantly validate any gmx.us 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 gmx.us Emails in Bulk
Have a mailing list full of gmx.us 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 gmx.us Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates gmx.us 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, gmx.us is a valid free email domain operated by 1&1 Mail & Media. It provides permanent email accounts to users.
No, gmx.us is not a disposable or temporary email provider. It offers permanent email accounts with standard email features.
gmx.us uses mail servers operated by 1&1 Mail & Media. Check the MX records section above for specific server details.
Yes, with proper opt-in consent. Follow email best practices and ensure SPF, DKIM, and DMARC authentication is configured for your sending domain.
Use BulkEmailChecker to verify gmx.us addresses via SMTP checks. Verification behavior varies by provider. Our tool handles provider-specific rate limiting automatically.
The fastest and most accurate way to verify a gmx.us 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 gmx.us'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 gmx.us 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 gmx.us 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 gmx.us 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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