rk.com

Valid Email Server
Domain Lookup › rk.com

Domain Overview

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

Checked via [email protected] · 2026-03-22 18:47:26 UTC · ↺ Refresh

MX Hostnames

  • mxb-002a0701.gslb.pphosted.com
  • mxa-002a0701.gslb.pphosted.com

MX Priorities

  • mxa-002a0701.gslb.pphosted.com: 10
  • mxb-002a0701.gslb.pphosted.com: 10

A / AAAA Records

  • 66.254.114.234 ↩ reflectededge.reflected.net

Mail Server IPs

  • 67.231.151.26 ↩ mx0d-002a0701.pphosted.com
  • 67.231.158.156 ↩ mx0c-002a0701.pphosted.com

SOA Record

Raw SOA ns-531.awsdns-02.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-531.awsdns-02.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-92.awsdns-11.com
sdns3.ultradns.biz
sdns3.ultradns.com
sdns3.ultradns.net
sdns3.ultradns.org
ns-1499.awsdns-59.org
ns-1567.awsdns-03.co.uk
ns-531.awsdns-02.net

SPF Record

✓ Strict (-all)
v=spf1 include:_spf.rocketgate.com ip4:208.91.205.0/27 ip4:208.91.205.151 a mx -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

✓ 1 found
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

6 records
  • google-site-verification=jY6rwjN7R1yotXyy2MTHyfth6x-l0PUUyN9emC6KQEY
  • spf2.0/pra,mfrom +ip4:208.91.205.0/27 +ip4:208.91.205.151 +mx +a -all
  • SPFv=spf1 include:_spf.rocketgate.com ip4:208.91.205.0/27 ip4:208.91.205.151 a mx -all
  • ms=ms12673904
  • 580tyszr5g8kgpkp9scmsgl1bc22rhcy
  • lg4p8t33zj6b9p2ywrnpx8l8491h8bsn
Full email verification for rk.com

Run SMTP check, SPF/DKIM/DMARC and catch-all detection.

SPF / DKIM / DMARC Get 1,000 Free Credits