Summary
- Registrar
- InterNetX GmbH
- Status
- clientTransferProhibited
- Created on
- September 21, 2019
- Expires on
- September 21, 2027
- Name servers
- a.ns.bsws.de, b.ns.bsws.de, c.ns.bsws.de
- Mail servers
- a.mx.bsws.de, b.mx.bsws.de
- DKIM
- No key found among the common selectors
- Website
- See the website
MX, SPF, DKIM and DMARC: the e-mail records
Four DNS records make a domain's e-mail work. MX says where e-mails sent to gothub.org arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from gothub.org was really sent by this domain, which protects it against spoofing.
MX
An MX (Mail Exchanger) record designates a server that receives e-mails sent to the domain. When someone writes to an @gothub.org address, their mail server queries the DNS for the domain's MX records, then delivers the message to the server they point to.
Example record
gothub.org MX 10 mx1.gothub.org. gothub.org MX 20 mx2.gothub.org.
What the record contains
- 10, 20
- Priority: the server with the lowest number is tried first. Servers with equal priority share the load.
- mx1.gothub.org.
- Host name of the mail server. It must point to an A or AAAA record: an IP address or an alias (CNAME) is not allowed here.
- 0 .
- An MX "0 .", called a null MX, declares that the domain accepts no e-mail: sending servers give up at once instead of retrying.
Declaring at least two servers with different priorities avoids losing e-mails during an outage: sending servers retry for several days and fall back on the backup server. Without any MX, they try to deliver directly to the IP address of the domain.
SPF
SPF (Sender Policy Framework) is a TXT record listing the servers allowed to send e-mails on behalf of the domain. The receiving server checks that the sender is on this list. The final "all" rule says what to do with other servers: reject them (-all), flag their e-mails as suspicious (~all) or make no decision (?all).
Example record
gothub.org TXT "v=spf1 mx include:_spf.google.com ip4:192.0.2.10 -all"
What the record contains
- v=spf1
- Identifies the record as an SPF policy. It must come first.
- ip4, ip6
- Allows a specific IP address or an address range, for example ip4:192.0.2.0/24.
- a, mx
- Allows the addresses of the domain itself (A record) or those of its mail servers (MX).
- include
- Allows the servers of another domain, usually a sending service: include:_spf.google.com for Google Workspace.
- -all, ~all
- Final rule, applied to every other server. Its qualifier decides what happens to them: - rejects them, ~ flags their e-mails as suspicious, ? makes no decision, + accepts them (avoid it).
A domain must publish only one SPF record, and its evaluation cannot exceed 10 DNS lookups (include, a, mx, exists, redirect). Beyond that, mail servers treat it as invalid.
DKIM
DKIM (DomainKeys Identified Mail) signs every outgoing e-mail with a private key. The matching public key is published in a TXT record at selector._domainkey.gothub.org, so the recipient can check that the message really comes from the domain and was not altered on the way. The selector is chosen by each sending service and cannot be guessed: Dataweaz checks the most common ones (Google Workspace, Microsoft 365, Mailchimp, SendGrid…), so a key published under another selector may exist without appearing here.
Example record
google._domainkey.gothub.org TXT "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA…"
What the record contains
- v=DKIM1
- Protocol version. Optional but recommended, in which case it must come first.
- k
- Key algorithm: rsa, the most common, or ed25519.
- p
- Public key, base64-encoded. An empty value means the key has been revoked.
- t
- Flags: y marks a key in testing, whose failures must not be penalized; s forbids its use for subdomains.
Each sending service publishes its key under its own selector (google, selector1, k1…), which allows several keys and seamless rotation. A 2048-bit RSA key is recommended today.
DMARC
DMARC (Domain-based Message Authentication, Reporting and Conformance) builds on SPF and DKIM. Published on _dmarc.gothub.org, it tells mail servers what to do with an e-mail that fails these checks (let it through, send it to spam or reject it) and where to send reports.
Example record
_dmarc.gothub.org TXT "v=DMARC1; p=quarantine; rua=mailto:[email protected]; adkim=r; aspf=r"
What the record contains
- v=DMARC1
- Identifies the record as a DMARC policy. It must come first.
- p
- Policy applied to e-mails that fail the checks: none (monitoring only), quarantine (spam folder) or reject.
- sp
- Subdomain policy. Without it, subdomains follow the domain's policy.
- rua
- Address that receives daily aggregate reports about e-mails sent on behalf of the domain, whether they pass the checks or not.
- ruf
- Address that receives detailed failure reports, message by message. Few providers still send them.
- pct
- Percentage of e-mails subject to the policy, for a gradual rollout. 100 by default.
- adkim, aspf
- DKIM and SPF alignment: r (relaxed, a subdomain of the same domain is enough) or s (strict, the domain must be identical).
To roll out DMARC without blocking legitimate e-mails, start with p=none and an rua address, analyze the reports to find every service sending on behalf of the domain, then move to quarantine and finally to reject.
DNS records of gothub.org
IP addresses (A and AAAA)
An A record maps the domain name to an IPv4 address: the address of the server that browsers contact to display the website. The AAAA record does the same for an IPv6 address. A domain can have several of them to spread visits across several servers.
| Type | IP address |
|---|---|
| A | 88.205.25.213 |
| AAAA | 2a00:12e8:201:19::5 |
Name servers (NS)
NS records designate the authoritative DNS servers of the domain: they answer every question about its other records (A, MX, TXT…). They are provided by the registrar, the hosting provider or a dedicated DNS service, and several servers are declared so that the domain keeps working if one of them fails.
| Server | IP address |
|---|---|
| a.ns.bsws.de | 80.86.183.56 |
| b.ns.bsws.de | 80.86.183.57 |
| c.ns.bsws.de | 46.29.43.7 |
Mail servers (MX)
MX records point to the servers that receive e-mails sent to the domain, that is to @gothub.org addresses. Each server has a priority: the one with the lowest number is tried first, the others take over if it fails. Without an MX record, the domain cannot receive e-mails.
| Priority | Server | IP address |
|---|---|---|
| 10 | a.mx.bsws.de | 80.86.183.49 |
| 20 | b.mx.bsws.de | 80.86.183.50 |
TXT records
TXT records hold free text. They are used to prove ownership of the domain to online services (Google, Microsoft, Facebook…) and to publish e-mail security rules: SPF on the domain itself, DMARC on _dmarc.gothub.org.
No TXT record.
Related IP addresses
IPv4 addresses used by gothub.org: website, name servers, mail servers and senders authorized by SPF.
| IP address | Used for | /24 block |
|---|---|---|
| 88.205.25.213 | Website | 88.205.25.0/24 |
| 80.86.183.56 | Name server a.ns.bsws.de | 80.86.183.0/24 |
| 80.86.183.57 | Name server b.ns.bsws.de | 80.86.183.0/24 |
| 46.29.43.7 | Name server c.ns.bsws.de | 46.29.43.0/24 |
| 80.86.183.49 | Mail server a.mx.bsws.de | 80.86.183.0/24 |
| 80.86.183.50 | Mail server b.mx.bsws.de | 80.86.183.0/24 |
WHOIS of the domain gothub.org
Domain Name: gothub.org Registry Domain ID: REDACTED Registrar WHOIS Server: whois.registrar.internetx.com Registrar URL: https://www.internetx.com Updated Date: 2026-09-21T13:17:21Z Creation Date: 2019-09-21T13:17:12Z Registry Expiry Date: 2027-09-21T13:17:12Z Registrar: InterNetX GmbH Registrar IANA ID: 151 Registrar Abuse Contact Email: [email protected] Registrar Abuse Contact Phone: +49.941595590 Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited Domain Status: autoRenewPeriod https://icann.org/epp#autoRenewPeriod Name Server: a.ns.bsws.de Name Server: b.ns.bsws.de Name Server: c.ns.bsws.de DNSSEC: signedDelegation URL of the ICANN Whois Inaccuracy Complaint Form: https://icann.org/wicf/ >>> Last update of WHOIS database: 2026-10-02T08:46:32Z <<< For more information on Whois status codes, please visit https://icann.org/epp Terms of Use: Access to Public Interest Registry WHOIS information is provided to assist persons in determining the contents of a domain name registration record in the Public Interest Registry registry database. The data in this record is provided by Public Interest Registry for informational purposes only, and Public Interest Registry does not guarantee its accuracy. This service is intended only for query-based access. You agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data to (a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the data recipient's own existing customers; or (b) enable high volume, automated, electronic processes that send queries or data to the systems of Registry Operator, a Registrar, or Identity Digital except as reasonably necessary to register domain names or modify existing registrations. All rights reserved. Public Interest Registry reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy. The Registrar of Record identified in this output may have an RDDS service that can be queried for additional information on how to contact the Registrant, Admin, or Tech contact of the queried domain name. Domain Name: gothub.org Registry Domain ID: ab20df94ce8c45d49ebd9389872c5be5-LROR Registrar WHOIS Server: whois.registrar.internetx.com Registrar URL: https://registrar.internetx.com Updated Date: 2026-02-08T13:33:49Z Creation Date: 2019-09-21T13:17:12Z Registrar Registration Expiration Date: 2027-02-08T12:22:04Z Registrar: InterNetX GmbH Registrar IANA ID: 151 Registrar Abuse Contact Email: [email protected] Registrar Abuse Contact Phone: +49.94159559482 Domain Status: clientTransferProhibited https://www.icann.org/epp#clientTransferProhibited Registry Registrant ID: Registrant Name: Admin Contact Registrant Organization: PrivateName Services Inc. Registrant Street: 1100-1200 West 73rd Avenue Registrant City: Vancouver Registrant State/Province: BC Registrant Postal Code: V6P 6G5 Registrant Country: CA Registrant Phone: +1.6047572882 Registrant Phone Ext: Registrant Fax: +1.6047572882 Registrant Fax Ext: Registrant Email: [email protected] Registry Admin ID: Admin Name: Admin Contact Admin Organization: PrivateName Services Inc. Admin Street: 1100-1200 West 73rd Avenue Admin City: Vancouver Admin State/Province: BC Admin Postal Code: V6P 6G5 Admin Country: CA Admin Phone: +1.6047572882 Admin Phone Ext: Admin Fax: +1.6047572882 Admin Fax Ext: Admin Email: [email protected] Registry Tech ID: Tech Name: Admin Contact Tech Organization: PrivateName Services Inc. Tech Street: 1100-1200 West 73rd Avenue Tech City: Vancouver Tech State/Province: BC Tech Postal Code: V6P 6G5 Tech Country: CA Tech Phone: +1.6047572882 Tech Phone Ext: Tech Fax: +1.6047572882 Tech Fax Ext: Tech Email: [email protected] Name Server: a.ns.bsws.de Name Server: b.ns.bsws.de Name Server: c.ns.bsws.de DNSSEC: signedDelegation URL of the ICANN WHOIS Data Problem Reporting System: https://wdprs.internic.net/ >>> Last update of WHOIS database: 2026-10-02T08:46:34Z <<< For more information on Whois status codes, please visit https://www.icann.org/epp # Terms and conditions: # # The data in the WHOIS database of InterNetX GmbH is provided by # InterNetX GmbH for information purposes, and to assist persons in # obtaining information about or related to a domain name registration # record. InterNetX GmbH does not guarantee its accuracy. By submitting # a WHOIS query, you agree that you will use this data only for lawful # purposes and that, under no circumstances, you will use this data to # (1) allow, enable, or otherwise support the transmission of mass # unsolicited, commercial advertising or solicitations via E-mail # (spam); or # (2) enable high volume, automated, electronic processes that apply to # InterNetX GmbH or its systems. # InterNetX GmbH reserves the right to modify these terms at any time. # By submitting this query, you agree to abide by this policy. # You acknowledge and agree that InterNetX reserves the right to take # appropriate action against you in the event of any breach of the WHOIS # system and may prevent you from using the WHOIS tools. # % Query time: 3712 msec % WHEN: Fri Oct 02 08:46:31 UTC 2026