x.com
Number 44 of the Top 100 · Tranco rank 50
x.com is X, the social network formerly called Twitter.
Can x.com be forged?
Can x.com be forged?
No. Receivers that check DMARC refuse mail that forges x.com or its subdomains.
- The exact name
- reject · subdomains reject · no reports asked for
- Names that copy
- 189 registered lookalikes can send mail. DMARC never sees them. See them →
What we noticed
- exists:%{i}._spf.mta.salesforce.com resolves for each message, so the senders it allows cannot be listed from outside.
Senders it names Google Workspace, Salesforce
- Google Workspace include:_spf.google.com· DKIM key found
- Salesforce include:_spf.salesforce.com
- Google Workspace runs its mail hosts
These are the services the records name. A record can name a service no longer used, and a sender can sign without being named.
SPF-all · 6 of 10 lookups · at least 103 thousand addresses
Refuses others · 6 of 10 lookups · 0 of 2 void lookups · 103,172 IPv4 addresses · 6 IPv6 blocks · Kept by a sender-policy service
The full list cannot be known from outside: it uses macros.
Every term and include
DKIM1 key found
- google._domainkey · rsa 2048· Google Workspace
We look under the selectors of the services the records name. A domain can have keys we do not find.
Sending names 21 names, 21 at reject
| Name | Policy | SPF lookups | Reports to |
|---|---|---|---|
| analytics.x.com | reject (inherited) | 1 | — |
| apps.x.com | reject (inherited) | 1 | — |
| careers.x.com | reject (inherited) | 1 | — |
| console.x.com | reject (inherited) | 1 | — |
| dev.x.com | reject (inherited) | 1 | — |
| developer.x.com | reject (inherited) | 1 | — |
| developers.x.com | reject (inherited) | 1 | — |
| event.x.com | reject (inherited) | 1 | — |
| graphql.x.com | reject (inherited) | 1 | — |
| investor.x.com | reject (inherited) | 1 | — |
| jobs.x.com | reject (inherited) | 1 | — |
| m.x.com | reject (inherited) | 1 | — |
| mail.x.com | reject | 1 | nowhere |
| marketing.x.com | reject (inherited) | 1 | — |
| media.x.com | reject (inherited) | 1 | — |
| partners.x.com | reject (inherited) | 1 | — |
| payments.x.com | reject (inherited) | 1 | — |
| search.x.com | reject (inherited) | 1 | — |
| shop.x.com | reject (inherited) | — | — |
| video.x.com | reject (inherited) | 1 | — |
| www.x.com | reject (inherited) | 6 | — |
Reportsnowhere, on every name
Aggregate reports (rua) go to mailto:caf935f12c8645b2921b0749d1fcd49e@dmarc-reports.cloudflare.net. No failure reports are asked for.
Transport MTA-STS none · TLS-RPT none · BIMI none
MTA-STS asks senders to deliver to x.com over encrypted connections only. TLS-RPT asks for reports when they cannot. BIMI shows a logo beside mail that passes DMARC at quarantine or reject.
Read on Oct 28, 2026. Check it again yourself →
Watch your own domain's mail this way: Sender Security · the DMARC Report