Summary
- Registrar
- Tucows Domains Inc.
- Status
- ok
- Created on
- August 18, 2025
- Expires on
- August 18, 2027
- Name servers
- ns1.vercel-dns.com, ns2.vercel-dns.com
- Mail servers
- —
- 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 streamdown.ai arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from streamdown.ai 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 @streamdown.ai 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
streamdown.ai MX 10 mx1.streamdown.ai. streamdown.ai MX 20 mx2.streamdown.ai.
What the record contains
- 10, 20
- Priority: the server with the lowest number is tried first. Servers with equal priority share the load.
- mx1.streamdown.ai.
- 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
streamdown.ai 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.streamdown.ai, 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.streamdown.ai 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.streamdown.ai, 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.streamdown.ai 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 streamdown.ai
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 | 64.239.109.129 |
| A | 64.239.109.65 |
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 |
|---|---|
| ns1.vercel-dns.com | 198.51.44.13 |
| ns2.vercel-dns.com | 198.51.45.13 |
Mail servers (MX)
MX records point to the servers that receive e-mails sent to the domain, that is to @streamdown.ai 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.
No mail server: the domain does not receive e-mails.
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.streamdown.ai.
No TXT record.
Related IP addresses
IPv4 addresses used by streamdown.ai: website, name servers, mail servers and senders authorized by SPF.
| IP address | Used for | /24 block |
|---|---|---|
| 64.239.109.129 | Website | 64.239.109.0/24 |
| 64.239.109.65 | Website | 64.239.109.0/24 |
| 198.51.44.13 | Name server ns1.vercel-dns.com | 198.51.44.0/24 |
| 198.51.45.13 | Name server ns2.vercel-dns.com | 198.51.45.0/24 |
WHOIS of the domain streamdown.ai
Domain Name: streamdown.ai Registry Domain ID: f472047885d2457795cad6aea7651f68-DONUTS Registrar WHOIS Server: whois.tucows.com Registrar URL: http://www.tucows.com Updated Date: 2026-08-12T09:58:52Z Creation Date: 2025-08-18T17:12:15Z Registry Expiry Date: 2027-08-18T17:12:15Z Registrar: Tucows Domains Inc. Registrar IANA ID: 69 Registrar Abuse Contact Email: [email protected] Registrar Abuse Contact Phone: +1.4165350123 Domain Status: ok https://icann.org/epp#ok Registry Registrant ID: 40ab63c64c9b465c87b4c070f93d7c1b-DONUTS Registrant Name: Vercel Whois Registrant Organization: Vercel Inc. Registrant Street: 340 S Lemon Ave Suite 4133 Owner Registrant City: Walnut Registrant State/Province: CA Registrant Postal Code: 91789 Registrant Country: US Registrant Phone: +1.4158551452 Registrant Phone Ext: Registrant Fax: Registrant Fax Ext: Registrant Email: [email protected] Registry Admin ID: e1196ac57444401fb73061973d9a87b2-DONUTS Admin Name: Vercel Whois Admin Organization: Vercel Inc. Admin Street: 340 S Lemon Ave Suite 4133 Admin Admin City: Walnut Admin State/Province: CA Admin Postal Code: 91789 Admin Country: US Admin Phone: +1.4158551452 Admin Phone Ext: Admin Fax: Admin Fax Ext: Admin Email: [email protected] Registry Tech ID: 091a86de09474bb0b0c1af9122fc1ebc-DONUTS Tech Name: Vercel Whois Tech Organization: Vercel Inc. Tech Street: 340 S Lemon Ave Suite 4133 Tech Tech City: Walnut Tech State/Province: CA Tech Postal Code: 91789 Tech Country: US Tech Phone: +1.4158551452 Tech Phone Ext: Tech Fax: Tech Fax Ext: Tech Email: [email protected] Name Server: ns1.vercel-dns.com Name Server: ns2.vercel-dns.com DNSSEC: unsigned URL of the ICANN Whois Inaccuracy Complaint Form: https://icann.org/wicf/ >>> Last update of WHOIS database: 2026-10-01T14:21:51Z <<< For more information on Whois status codes, please visit https://icann.org/epp Terms of Use: Access to WHOIS information is provided to assist persons in determining the contents of a domain name registration record in the registry database. The data in this record is provided by Identity Digital or the Registry Operator for informational purposes only, and accuracy is not guaranteed. 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. When using the Whois service, please consider the following: The Whois service is not a replacement for standard EPP commands to the SRS service. Whois is not considered authoritative for registered domain objects. The Whois service may be scheduled for downtime during production or OT&E maintenance periods. Queries to the Whois services are throttled. If too many queries are received from a single IP address within a specified time, the service will begin to reject further queries for a period of time to prevent disruption of Whois service access. Abuse of the Whois system through data mining is mitigated by detecting and limiting bulk query access from single sources. Where applicable, the presence of a [Non-Public Data] tag indicates that such data is not made publicly available due to applicable data privacy laws or requirements. Should you wish to contact the registrant, please refer to the Whois records available through the registrar URL listed above. Access to non-public data may be provided, upon request, where it can be reasonably confirmed that the requester holds a specific legitimate interest and a proper legal basis for accessing the withheld data. Access to this data provided by Identity Digital can be requested by submitting a request via the form found at https://www.identity.digital/about/policies/whois-layered-access/. 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. Identity Digital Inc. and Registry Operator reserve the right to modify these terms at any time. By submitting this query, you agree to abide by this policy. Domain Name: STREAMDOWN.AI Registry Domain ID: Registrar WHOIS Server: whois.tucows.com Registrar URL: http://tucowsdomains.com Updated Date: 2025-08-18T17:12:15 Creation Date: 2025-08-18T17:12:14 Registrar Registration Expiration Date: 2027-08-18T17:12:15 Registrar: TUCOWS.COM, CO. Registrar IANA ID: 69 Reseller: Vercel Inc Domain Status: Registry Registrant ID: Registrant Name: REDACTED FOR PRIVACY Registrant Organization: REDACTED FOR PRIVACY Registrant Street: REDACTED FOR PRIVACY Registrant City: REDACTED FOR PRIVACY Registrant State/Province: CA Registrant Postal Code: REDACTED FOR PRIVACY Registrant Country: US Registrant Phone: REDACTED FOR PRIVACY Registrant Phone Ext: Registrant Fax: REDACTED FOR PRIVACY Registrant Fax Ext: Registrant Email: https://tieredaccess.com/contact/88053ce0-1871-4937-b157-c38122e86206 Registry Admin ID: Admin Name: REDACTED FOR PRIVACY Admin Organization: REDACTED FOR PRIVACY Admin Street: REDACTED FOR PRIVACY Admin City: REDACTED FOR PRIVACY Admin State/Province: REDACTED FOR PRIVACY Admin Postal Code: REDACTED FOR PRIVACY Admin Country: REDACTED FOR PRIVACY Admin Phone: REDACTED FOR PRIVACY Admin Phone Ext: Admin Fax: REDACTED FOR PRIVACY Admin Fax Ext: Admin Email: REDACTED FOR PRIVACY Registry Tech ID: Tech Name: REDACTED FOR PRIVACY Tech Organization: REDACTED FOR PRIVACY Tech Street: REDACTED FOR PRIVACY Tech City: REDACTED FOR PRIVACY Tech State/Province: REDACTED FOR PRIVACY Tech Postal Code: REDACTED FOR PRIVACY Tech Country: REDACTED FOR PRIVACY Tech Phone: REDACTED FOR PRIVACY Tech Phone Ext: Tech Fax: REDACTED FOR PRIVACY Tech Fax Ext: Tech Email: REDACTED FOR PRIVACY Name Server: ns1.vercel-dns.com Name Server: ns2.vercel-dns.com DNSSEC: unsigned Registrar Abuse Contact Email: [email protected] Registrar Abuse Contact Phone: +1.4165350123 >>> Last update of WHOIS database: 2026-10-01T14:21:52Z <<< Registration Service Provider: Vercel Inc, [email protected] +1.9513836898 https://vercel.com This company may be contacted for domain login/passwords, DNS/Nameserver changes, and general domain support questions. The Data in the Tucows Registrar WHOIS database is provided to you by Tucows for information purposes only, and may be used to assist you in obtaining information about or related to a domain name's registration record. Tucows makes this information available "as is," and 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 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 any Registry Operator or ICANN-Accredited registrar, except as reasonably necessary to register domain names or modify existing registrations. The compilation, repackaging, dissemination or other use of this Data is expressly prohibited without the prior written consent of Tucows. Tucows reserves the right to terminate your access to the Tucows WHOIS database in its sole discretion, including without limitation, for excessive querying of the WHOIS database or for failure to otherwise abide by this policy. Tucows reserves the right to modify these terms at any time. By submitting this query, you agree to abide by these terms. NOTE: THE WHOIS DATABASE IS A CONTACT DATABASE ONLY. LACK OF A DOMAIN RECORD DOES NOT SIGNIFY DOMAIN AVAILABILITY. % Query time: 953 msec % WHEN: Thu Oct 01 14:21:51 UTC 2026