phelpsdunbar.com

Valid Email Server
Domain Lookup › phelpsdunbar.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
phelpsdunbar.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-19 18:11:00 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 54.203.180.53 ↩ ec2-54-203-180-53.us-west-2.compute.amazonaws.com

Mail Server IPs

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

SOA Record

Raw SOA ns-1353.awsdns-41.org awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1353.awsdns-41.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-112.awsdns-14.com
ns-1353.awsdns-41.org
ns-1912.awsdns-47.co.uk
ns-1000.awsdns-61.net

SPF Record

✓ Soft Fail (~all)
v=spf1 mx a ip4:65.17.245.37 ip4:65.17.213.93 ip4:63.128.97.193 ip4:72.237.118.226 ip4:63.128.97.193 ip4:72.237.118.226 include:_netblocks.mimecast.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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 ip4:65.17.245.37 ip4:65.17.213.93 ip4:63.128.97.193 ip4:72.237.118.226 ip4:63.128.97.193 ip4:72.237.118.226 include:_netblocks.mimecast.com ~all
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
See demo & docs
Deep verification
Full email verification for phelpsdunbar.com

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits