penton.com

Valid Email Server
Domain Lookup › penton.com

Domain Overview

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

Checked via [email protected] · 2026-03-26 17:39:35 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 104.18.42.117 (no PTR)
  • 172.64.145.139 (no PTR)
  • 2606:4700:4407::6812:2a75 (no PTR)
  • 2a06:98c1:3100::ac40:918b (no PTR)

Mail Server IPs

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

SOA Record

Raw SOA ns1.informadns.com dns.cloudflare.com 2399729723 10000 2400 604800 1800
Primary NS (mname)
ns1.informadns.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399729723
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

ns1.informadns.com
ns2.informadns.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_u.penton.com._spf.smart.ondmarc.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; pct=100; fo=1; ri=3600; rua=mailto:[email protected]; ruf=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 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

2 records
  • SPFv=spf1 include:_u.penton.com._spf.smart.ondmarc.com ~all
  • MS=ms98580132
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