Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rkk.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-25 21:29:48 UTC · ↺ Refresh
MX Hostnames
- mx2.hc4692-70.iphmx.com
- mx1.hc4692-70.iphmx.com
MX Priorities
- mx1.hc4692-70.iphmx.com: 10
- mx2.hc4692-70.iphmx.com: 10
A / AAAA Records
- 162.159.135.42 (no PTR)
Mail Server IPs
- 207.54.81.168 ↩ esa1.hc4692-70.iphmx.com
- 207.54.86.143 ↩ esa2.hc4692-70.iphmx.com
SOA Record
Raw SOA
ns1-01.azure-dns.com hostmaster.rkk.com 2017042501 10800 3600 604800 86400
Primary NS (mname)
ns1-01.azure-dns.com
Admin Email (rname)
hostmaster@rkk.com
Serial
2017042501
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns2-01.azure-dns.net
ns3-01.azure-dns.org
ns4-01.azure-dns.info
ns1-01.azure-dns.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_u.rkk.com._spf.smart.ondmarc.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; sp=reject; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; adkim=r; aspf=r; fo=1; rf=afrf; ri=3600
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- _l7anvf1l309rk17c9zr2s7n53acd6a2
- dell-technologies-domain-verification=rkk.com_c1488d68-82eb-4c8e-b39f-550becf71c70_1775144165
- SPFv=spf1 include:_u.rkk.com._spf.smart.ondmarc.com ~all
- _mgiv5ce3fqnevbaiugf72sx1tqd4pyt
- google-site-verification=nSo7V1fUhSYUi2yn0ECtRwkirLR8EaE76op3Yh1NLrI
Full email verification for rkk.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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