cs.miami.edu

Valid Email Server
Domain Lookup › cs.miami.edu
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
cs.miami.edu
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-06-03 08:32:26 UTC · ↺ Refresh

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MX Hostnames

  • ASPMX.L.GOOGLE.COM
  • ALT2.ASPMX.L.GOOGLE.COM
  • ALT1.ASPMX.L.GOOGLE.COM

MX Priorities

  • alt1.aspmx.l.google.com: 20
  • alt2.aspmx.l.google.com: 20
  • aspmx.l.google.com: 10

A / AAAA Records

  • 20.81.38.79 (no PTR)

Mail Server IPs

  • 108.177.123.27 ↩ lcscld-in-f27.1e100.net
  • 2800:3f0:4003:c0f::1b (no PTR)
  • 172.253.116.26 ↩ dj-in-f26.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
  • 142.251.167.26 ↩ ww-in-f26.1e100.net
  • 2607:f8b0:4004:c08::1a ↩ bi-in-f26.1e100.net

SOA Record

Raw SOA ns1.cs.miami.edu burt.cs.miami.edu 2025082301 720 180 1400000 180
Primary NS (mname)
ns1.cs.miami.edu
Admin Email (rname)
burt@cs.miami.edu
Serial
2025082301
Refresh
720s
Retry
180s
Expire
1400000s
Minimum TTL
180s

Nameservers (NS)

ns-1425.awsdns-50.org
ns-350.awsdns-43.com
ns1.cs.miami.edu
ns-1596.awsdns-07.co.uk
ns-641.awsdns-16.net

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:192.31.89.0/24 ip4:129.171.34.11 include:_spf.google.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; sp=quarantine; adkim=r; aspf=r; fo=1; ri=86400; 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]
↳ Subdomain policy: quarantine

DKIM Selectors

✓ 1 found
google._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google

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

All TXT Records

2 records
  • SPFv=spf1 ip4:192.31.89.0/24 ip4:129.171.34.11 include:_spf.google.com ~all
  • docusign=d825a868-b885-4883-9080-5c1debbf9657
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