refbr.com

Valid Email Server
Domain Lookup › refbr.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
refbr.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-22 10:52:47 UTC · ↺ Refresh

MX Hostnames

  • mx2.mailchannels.net
  • mx1.mailchannels.net

MX Priorities

  • mx1.mailchannels.net: 0
  • mx2.mailchannels.net: 0

A / AAAA Records

  • 172.67.151.236 (no PTR)
  • 104.21.12.82 (no PTR)
  • 2606:4700:3032::6815:c52 (no PTR)
  • 2606:4700:3035::ac43:97ec (no PTR)

Mail Server IPs

  • 52.38.143.159 ↩ ec2-52-38-143-159.us-west-2.compute.amazonaws.com
  • 18.236.29.166 ↩ ec2-18-236-29-166.us-west-2.compute.amazonaws.com

SOA Record

Raw SOA finley.ns.cloudflare.com dns.cloudflare.com 2398407109 10000 2400 604800 1800
Primary NS (mname)
finley.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398407109
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

karina.ns.cloudflare.com
finley.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 mx include:netblocks.dreamhost.com include:relay.mailchannels.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No 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

2 records
  • SPFv=spf1 mx include:netblocks.dreamhost.com include:relay.mailchannels.net -all
  • google-site-verification=XXnE88TL3_Y_1IzwaQchKvWlbDBShWhEKMyPIxKp290
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