Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
duffandphelps.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 21:13:43 UTC · ↺ Refresh
MX Hostnames
- usb-smtp-inbound-1.mimecast.com
- usb-smtp-inbound-2.mimecast.com
MX Priorities
- usb-smtp-inbound-2.mimecast.com: 10
- usb-smtp-inbound-1.mimecast.com: 10
A / AAAA Records
- 162.159.135.81 (no PTR)
- 162.159.136.81 (no PTR)
- 2606:4700:7::a29f:8851 (no PTR)
- 2606:4700:7::a29f:8751 (no PTR)
Mail Server IPs
- 170.10.150.242 ↩ usb-smtp-delivery-2.mimecast.com
- 170.10.152.242 ↩ usb-smtp-delivery-2.mimecast.com
SOA Record
Raw SOA
arya.ns.cloudflare.com dns.cloudflare.com 2399174346 10000 2400 604800 1800
Primary NS (mname)
arya.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399174346
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
arya.ns.cloudflare.com
nick.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:148.163.138.138 ip4:148.163.134.147 include:usb._netblocks.mimecast.com include:sharepointonline.com include:mail.zendesk.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 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
26 records- slack-domain-verification=6cEygfX7vrXWzWi9fWTiQzIdvaCn8PEbxlnCRERh
- openai-domain-verification=dv-ciQYTlbmGlcnqyqeZzKG1jwq
- TIRn50RlR4U+B+noW2b3egCcEtBouh9iT2jf9FxceKdXYCld2z9MvkkI+PfBkezFVi78zhemRSVRL3gABQin3w==
- sbuy1QQo3wH+CVJq/JTNs/GIZp54ng3sCC8YteymaaQMsnqPD0+vor6L/CY2YYuPrinSfI6Ab80gN7S5qZYL2g==
- wg2f08s7rhf43l4mk1d0lh3b0lgqnkk0
- 112z85t6vjh28v36d0y1jpzdl4nsg93t
- sitecore-domain-verification=87e8004dbcb94583bd96abca7900a0a6
- MS=ms44304506
- yqgy1s4c3ylfn7bqhr3kbj7dnwj2nsp8
- facebook-domain-verification=zircx58jepjekrk1ryjic68j44pzp8
- box-domain-verification=84d7f2651c2ac2ac2a5bc53623442383107ca35787f58672fa8641791a68aec3
- bZYH6dC0iDwAL0QSJq/UG+Unp1OEMoFjqeRbnGv7xGfOueYozlAqhVT5X9tF0LXcV22SqkM6VmqhFvWd7JfPCw==
- atlassian-domain-verification=uhB5efiYB5SZMAA/OtMMZnKIWIMmk0aPCyK0MAFwgMY2Uq05z1Ug7XYB9QBpOkzb
- apple-domain-verification=UXeJBcOPtuxdsuNp
- docker-verification=611265a2-4bce-4fbf-8cc7-a7e6646124ee
- SPFv=spf1 ip4:148.163.138.138 ip4:148.163.134.147 include:usb._netblocks.mimecast.com include:sharepointonline.com include:mail.zendesk.com -all
- atlassian-domain-verification=kmfhKJPNXUQCZMdYiOaQlQN7JAbr/g3eCDEj76hyxjkWWW/U0MbjsvFqq6O9nqeH
- 5b659a1a3df7c979b756e64dda627e4eb6057a57494f490479c344248e0693e4
- _3r2z0zkc2l0yz2902icpihrnlgve9od
- _lp0f065sicaaq7q8veq2i36664c8jaq
- 2934359
- 72j4qpsqm7p18e9hs8vp9sdpc5
- uJ2qI376h7k04LqTm+eWkLJn783GZpw9xJKAMmSCz3fsPeafcL+mE0WRXcf1NWk4wabkeIGsvVWwRE3nFyAVeQ==
- anthropic-domain-verification-4jt7kx=KztOGx5v6LTiYLSczDj1grKbC
- bw=h6NOLJUayaJIJcvMu/OFrKo9odDq3ajJzIVTcM5AgVeu
- openai-domain-verification=dv-0486bYZjksqCHIfnNB4rFnsw
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