penrosecancercenter.org

Valid Email Server
Domain Lookup › penrosecancercenter.org

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
penrosecancercenter.org
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-27 13:01:48 UTC · ↺ Refresh

MX Hostnames

  • us-smtp-inbound-1.mimecast.com
  • us-smtp-inbound-2.mimecast.com

MX Priorities

  • us-smtp-inbound-2.mimecast.com: 10
  • us-smtp-inbound-1.mimecast.com: 10

A / AAAA Records

  • 172.67.178.158 (no PTR)
  • 104.21.17.224 (no PTR)
  • 2606:4700:3033::6815:11e0 (no PTR)
  • 2606:4700:3034::ac43:b29e (no PTR)

Mail Server IPs

  • 170.10.128.141 ↩ us-smtp-inbound-2.mimecast.com
  • 170.10.132.242 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.128.242 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.132.141 ↩ us-smtp-inbound-1.mimecast.com
  • 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com

SOA Record

Raw SOA albert.ns.cloudflare.com dns.cloudflare.com 2397987075 10000 2400 604800 1800
Primary NS (mname)
albert.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397987075
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

beth.ns.cloudflare.com
albert.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 mx a:out0004.emailopen.com ip4:66.97.162.20 ip4:66.97.162.33 ip4:66.97.162.34 ip4:66.97.163.33 ip4:66.97.163.34 ip4:66.97.162.19 ip4:66.97.163.19 ip4:208.117.51.45 ip4:167.89.81.19 include:us._netblocks.mimecast.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

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

1 record
  • SPFv=spf1 mx a:out0004.emailopen.com ip4:66.97.162.20 ip4:66.97.162.33 ip4:66.97.162.34 ip4:66.97.163.33 ip4:66.97.163.34 ip4:66.97.162.19 ip4:66.97.163.19 ip4:208.117.51.45 ip4:167.89.81.19 include:us._netblocks.mimecast.com -all
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