Domain Overview
DNS: ✓ just now
Checker: ✓ just now
tfbnw.net
Disposable
✓ Yes
Unknown
⚠ Yes
Yes
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-06-02 01:04:09 UTC · ↺ Refresh
MX Hostnames
- smtpin.vvv.facebook.com
MX Priorities
- smtpin.vvv.facebook.com: 10
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 173.252.82.250 ↩ msgin-regional-shv-01-rsnb0.facebook.com
- 2a03:2880:ff:fffd:face:b00c:0:686e ↩ msgin-regional6-shv-01-rprn0.facebook.com
SOA Record
Raw SOA
a.ns.facebook.com dns.facebook.com 4207849484 14400 1800 604800 3600
Primary NS (mname)
a.ns.facebook.com
Admin Email (rname)
dns@facebook.com
Serial
4207849484
Refresh
14400s
Retry
1800s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
b.ns.facebook.com
c.ns.facebook.com
a.ns.facebook.com
d.ns.facebook.com
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.fb.com include:_spf.facebook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; 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 include:_spf.fb.com include:_spf.facebook.com -all
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