Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
res.cisco.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-22 19:06:05 UTC · ↺ Refresh
MX Hostnames
- esa3.cres.iphmx.com
- esa2.cres.iphmx.com
- esa1.cres.iphmx.com
- esa4.cres.iphmx.com
MX Priorities
- esa3.cres.iphmx.com: 10
- esa4.cres.iphmx.com: 10
- esa1.cres.iphmx.com: 10
- esa2.cres.iphmx.com: 10
A / AAAA Records
- 52.45.189.200 ↩ ec2-52-45-189-200.compute-1.amazonaws.com
- 52.70.168.106 ↩ ec2-52-70-168-106.compute-1.amazonaws.com
- 50.16.158.125 ↩ ec2-50-16-158-125.compute-1.amazonaws.com
Mail Server IPs
- 68.232.135.234 ↩ esa3.cres.iphmx.com
- 68.232.135.235 ↩ esa4.cres.iphmx.com
- 68.232.140.79 ↩ esa1.cres.iphmx.com
- 68.232.140.57 ↩ esa2.cres.iphmx.com
SOA Record
Raw SOA
ns-1804.awsdns-33.co.uk awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1804.awsdns-33.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-89.awsdns-11.com
ns-1392.awsdns-46.org
ns-1804.awsdns-33.co.uk
ns-876.awsdns-45.net
SPF Record
✓ Strict (-all)
v=spf1 mx:res.cisco.com exists:%{i}.spf.res.cisco.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; pct=100; sp=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
dkim._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: dkim
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx:res.cisco.com exists:%{i}.spf.res.cisco.com -all
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