Domain Overview
DNS: ✓ 14d ago
Checker: ✓ 14d ago
5iron.com
Disposable
✓ Yes
Proofpoint
⚠ Yes
Yes
⚠ Yes
No
No
Checked via [email protected]
· 2026-08-15 10:07:03 UTC · ↺ Refresh
MX Hostnames
- mxb-00291201.gslb.pphosted.com
- mxa-00291201.gslb.pphosted.com
MX Priorities
- mxa-00291201.gslb.pphosted.com: 0
- mxb-00291201.gslb.pphosted.com: 0
A / AAAA Records
- 172.66.148.220 (no PTR)
- 104.20.23.226 (no PTR)
- 2606:4700:10::6814:17e2 (no PTR)
- 2606:4700:10::ac42:94dc (no PTR)
Mail Server IPs
- 67.231.144.53 ↩ mx0a-00291201.pphosted.com
SOA Record
Raw SOA
alex.ns.cloudflare.com dns.cloudflare.com 2411336654 10000 2400 604800 1800
Primary NS (mname)
alex.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2411336654
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
alex.ns.cloudflare.com
dolly.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf-00291201.pphosted.com ip4:149.72.135.226 include:_spf.atlassian.net include:7878631.spf10.hubspotemail.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected];fo=1
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✗ None detectedNo 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
7 records- atlassian-sending-domain-verification=051670dd-0b5c-4b75-95e7-1c73857af3cb
- openai-domain-verification=dv-G4VEvWiE6h0nmLfa5o6VGv4D
- smartsheet-site-validation=77lf3qyBQasNVhsNVcYPdyUtU_CeHEJl
- SPFv=spf1 include:spf-00291201.pphosted.com ip4:149.72.135.226 include:_spf.atlassian.net include:7878631.spf10.hubspotemail.net -all
- ZOOM_verify_BHL8e7eMv16g3b0jE00cRx
- atlassian-domain-verification=b7UAVUhW2ZMPgAl9qX0iYJRPdB6tTFnDh0bmcDYVblg0OX8nJAWDI2gWvB5ETAH+
- atlassian-domain-verification=zFpPCKvxz1xjbt4k1mjz1GzEXnO/flTBd8oGQ5BopUki6eOm/Wq5TiltQhP5VOPH
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site · Customize →
See demo & docs
Deep verification
Full email verification for 5iron.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits