Email domain · GMX (1&1 Mail & Media)
gmx.net email servers, SPF and DMARC
Mail for @gmx.net goes to mx00.emig.gmx.net (MX priority 10) and 1 backup host, as DNS showed on 5 November 2026. These are GMX (1&1 Mail & Media) servers. The domain publishes an SPF record v=spf1 redirect=_spf.gmx.net and a DMARC policy of p=quarantine, which decide whether mail claiming to be from @gmx.net is trusted.
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gmx.net mail DNS on 5 November 2026
| Priority | MX host | Platform |
|---|---|---|
| 10 | mx00.emig.gmx.net | GMX (1&1 Mail & Media) |
| 10 | mx01.emig.gmx.net | GMX (1&1 Mail & Media) |
| SPF | v=spf1 redirect=_spf.gmx.net |
|---|---|
| DMARC | v=DMARC1; p=quarantine; rua=mailto:[email protected] |
| MTA-STS | v=STSv1;id=20180928194800Z; |
| TLS reporting | v=TLSRPTv1;rua=mailto:[email protected] |
Read on 5 November 2026 with dig against 1.1.1.1 (8.8.8.8 as fallback); nothing sent to the mail servers. Check the records today with the email provider lookup.
gmx.net MX records
gmx.net publishes 2 MX hosts, all at priority 10, so senders spread mail across them.
6 other domains we checked on the same day also hand their mail to GMX (1&1 Mail & Media) servers, with different records from gmx.net: gmx.co.uk, gmx.es, gmx.fr, gmx.it, gmx.li and gmx.us.
gmx.net SPF record
The record on 5 November 2026 was v=spf1 redirect=_spf.gmx.net.
In plain terms, it delegates to _spf.gmx.net. The top level uses 1 DNS-querying term; SPF allows 10 in total including nested includes (RFC 7208 §4.6.4).
gmx.net DMARC policy
The record is v=DMARC1; p=quarantine; rua=mailto:[email protected].
p=quarantine asks receivers to send failing mail to spam.
Aggregate reports go to gmx.net, so the domain's owner sees who sends mail as @gmx.net.
What that means for you: if a contact gives an @gmx.net address and you send to them, nothing changes. But never put an @gmx.net address in the From line of mail sent through your own tool or ESP. It can't pass DMARC for gmx.net, and this policy tells receivers to junk it.
gmx.net TLS policy
_mta-sts.gmx.net publishes v=STSv1;id=20180928194800Z;, so gmx.net uses MTA-STS: sending servers that support it must deliver over verified TLS or not at all (RFC 8461).
It also asks for TLS reports with v=TLSRPTv1;rua=mailto:[email protected] (RFC 8460).
Domains on the same mail servers as gmx.net
6 other domains published exactly the same MX hosts and SPF record as gmx.net on 5 November 2026: gmx.at, gmx.biz, gmx.ch, gmx.eu, gmx.info and gmx.org. Mail to any of them lands on the same servers.
gmx.net shares mx00.emig.gmx.net and mx01.emig.gmx.net with gmx.de. When we tested those servers for gmx.de on 13 October 2026, the result was: Hard to verify. The server refuses connections it does not trust before answering about the mailbox.
Can you verify @gmx.net addresses?
Our checker treats @gmx.net like any domain: syntax, MX, disposable and role checks first, then a made-up address to rule out a catch-all, then your address at RCPT TO, disconnecting without sending. We have not tested @gmx.net itself, but its mail goes to the same servers as gmx.de, so expect @gmx.net results to follow the pattern described there. Each result carries its own reason.
Cleaning a list with these addresses
DNS tells you where mail goes, not whether one person's mailbox still exists. For a list, run the whole file through a verifier before you send: invalid rows come out, risky rows (catch-all, unknown, refused) go in their own segment, and valid rows are safe to mail.
What GMX (1&1 Mail & Media) documents for senders
- GMX publishes its own technical requirements for senders, covering authentication, reverse DNS and list hygiene. GMX Postmaster: requirements and recommendations
Common questions
- What are the MX records for gmx.net?
- On 5 November 2026:
mx00.emig.gmx.net(priority 10),mx01.emig.gmx.net(priority 10). - Does gmx.net have SPF and DMARC?
- On 5 November 2026
gmx.netpublished an SPF recordv=spf1 redirect=_spf.gmx.netand a DMARC policy ofp=quarantine. - Is gmx.net a disposable email domain?
- No.
gmx.netis not on the disposable domain list our checker uses, so @gmx.net addresses are checked like any other mailbox. See the disposable domain checker for the list. - Is gmx.net the same mail system as gmx.at?
- Its DNS says so: on 5 November 2026 both published the same MX hosts and SPF record, so mail to either lands on the same servers.
Free checks for @gmx.net lists
- Bulk email checker for a pasted list or CSV
- Verify a whole file with a reason for every row
- GMX address checker
- SPF lookup counter
- MTA-STS checker
- Disposable email checker
Another domain? See every email domain we have mapped and what our checker does at each mailbox provider.
Got a list with @gmx.net addresses?
Sign in with Google and the first 100 addresses are checked free: valid, risky and invalid, with the reason for each row and a file to download. No card. After that, plans start at $9/mo for 2,500 emails a month.
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