degree53.com

Valid Email Server
Domain Lookup › degree53.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
degree53.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-18 11:48:11 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

  • us-smtp-inbound-2.mimecast.com: 0
  • us-smtp-inbound-1.mimecast.com: 0

A / AAAA Records

  • 104.21.33.176 (no PTR)
  • 172.67.147.171 (no PTR)
  • 2606:4700:3033::ac43:93ab (no PTR)
  • 2606:4700:3036::6815:21b0 (no PTR)

Mail Server IPs

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

SOA Record

Raw SOA nikon.ns.cloudflare.com dns.cloudflare.com 2397879117 10000 2400 604800 1800
Primary NS (mname)
nikon.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397879117
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

sydney.ns.cloudflare.com
nikon.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:_netblocks.mimecast.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

15 records
  • SPFv=spf1 include:_netblocks.mimecast.com include:spf.protection.outlook.com -all
  • 0ed1fe018a20a1ac3cce34403db839d34653a2ba6f
  • MS=ms89769977
  • MS=ms93445304
  • d53-website-prod.azurewebsites.net
  • firebase=d53-appsworld
  • globalsign-domain-verification=fjJGuQ9iIL4t6JHF79Rpl4aWkus2YqoRARudIKwp76
  • google-site-verification=2zqBNkU55K2fBI3AhHITCfPhop12HSv0kLyS_2lFJG4
  • google-site-verification=SZGLbVWPwXz5Yon5Ff8oYFwOIdepFIxjp28jXIucH8M
  • google-site-verification=ySXQc_Y3WF9jqvOcOm3GzXMoU3mou3khbkREBxiH5y0
  • health-assured-portal-dev.azurewebsites.net
  • john-hogg-dev.azurewebsites.net
  • jtrg456fvphwvhk95j70z2rm4xz39s8m
  • lr47jtz53j8tycmnj3tfj3vhb1l6pdhr
  • spf.mandrillapp.com
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