Domain Overview
DNS: ✓ 7d ago
Checker: ✓ 7d ago
postmaster.twitter.com
Yes
✓ Yes
Unknown
No
Yes
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-25 12:55:14 UTC · ↺ Refresh
MX Hostnames
- mx1.twitter.com
- mx2.twitter.com
MX Priorities
- mx1.twitter.com: 10
- mx2.twitter.com: 10
A / AAAA Records
- 199.59.148.144 ↩ mx1.twitter.com
Mail Server IPs
- 199.59.148.144 ↩ mx1.twitter.com
- 199.59.148.205 ↩ mx2.twitter.com
SOA Record
No SOA record found.
Nameservers (NS)
No nameservers found.
SPF Record
✓ Strict (-all)
v=spf1 ip4:8.25.194.0/23 ip4:8.25.196.0/23 ip4:199.16.156.0/22 ip4:199.59.148.0/22 -all
📊 DNS lookups: 0/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:8.25.194.0/23 ip4:8.25.196.0/23 ip4:199.16.156.0/22 ip4:199.59.148.0/22 -all
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