gmx.com - Email Domain Verification & Deliverability Report

Active Free Email Provider
Organization: 1&1 Mail & Media
Mail Server: gmx.net
Verified 21 hours ago

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

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MX Records for gmx.com

PriorityMail ServerIP Address
10 mx01.gmx.net 212.227.17.4
10 mx00.gmx.net 212.227.15.10
SMTP Status: Responding
SMTP Banner:
220 gmx.net (mxgmx109) Nemesis ESMTP Service ready

gmx.com 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.com

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.com.

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.com 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.com
TLD
.com
Created
1994-05-06
Updated
2025-06-27
Expires
2026-04-06
Domain Age
31 years

Registrar

Name
World4You Internet Services GmbH
IANA ID
1476

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

About gmx.com Email Verification

gmx.com is a global free email service operated by 1&1 Mail and Media GmbH, part of United Internet AG headquartered in Montabaur, Germany. GMX (Global Mail eXchange) offers free and premium email with large attachment support, cloud storage, and spam filtering.

gmx.com implements SPF, DKIM, and DMARC for outbound messages. United Internet maintains strong anti-spam infrastructure across its email brands including GMX and WEB.DE. The service complies with EU GDPR standards.

The gmx.com mail servers enforce strict recipient verification and reject invalid addresses. The domain does not operate as catch-all. Rate limiting and reputation checks apply to inbound connections.

When sending to gmx.com, authenticate with SPF, DKIM, and DMARC. GMX applies thorough content analysis and sender reputation scoring. Maintain low bounce and complaint rates for optimal deliverability.

How to Verify gmx.com Email Addresses

Need to check if an email address at gmx.com actually exists before you send to it? BulkEmailChecker performs deep SMTP-level validation, connecting directly to gmx.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 gmx.com Email
Use BulkEmailChecker's free email verification tool to instantly validate any gmx.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 gmx.com Emails in Bulk
Have a mailing list full of gmx.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 gmx.com Emails via API in Real-Time
Building a signup form, CRM integration, or lead capture system? BulkEmailChecker's real-time verification API validates gmx.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, gmx.com is a valid and active email domain operated by 1&1 Mail & Media, part of United Internet AG. GMX (Global Mail eXchange) has been providing free email since 1997.
No, gmx.com is not a disposable email provider. It is a permanent free email service popular in Europe, especially Germany, and offers full-featured email accounts with generous storage.
GMX uses 1&1 Mail & Media infrastructure. MX records point to mx00.1and1.com and mx01.1and1.com, shared with mail.com and other United Internet email brands.
Yes, marketing emails can be sent to GMX addresses with proper consent. GMX uses reputation-based spam filtering. Proper SPF, DKIM authentication improves deliverability to GMX inboxes.
GMX addresses can be verified via SMTP checks with reliable accept/reject responses for valid and invalid addresses. The service does not use catch-all, making verification straightforward.
The fastest and most accurate way to verify a gmx.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 gmx.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 gmx.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 gmx.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 gmx.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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