sidwell.edu

Valid Email Server

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
sidwell.edu
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-24 16:11:04 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

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

A / AAAA Records

  • 104.17.68.73 (no PTR)
  • 104.17.67.73 (no PTR)
  • 104.17.70.73 (no PTR)
  • 104.17.71.73 (no PTR)
  • 104.17.69.73

Mail Server IPs

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

SOA Record

Raw SOA ns-1259.awsdns-29.org awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1259.awsdns-29.org
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-680.awsdns-21.net
ns-1259.awsdns-29.org
ns-1911.awsdns-46.co.uk
ns-49.awsdns-06.com

SPF Record

✓ Soft Fail (~all)
v=spf1 redirect=6fqiiiuu._spf._d.mim.ec
📊 DNS lookups: 1/10

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; sp=none; pct=100; adkim=r; aspf=r; fo=1; ri=3600; 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: none

DKIM Selectors

✓ 5 found
google._domainkey
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 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

3 records
  • openai-domain-verification=dv-6YPfJHJYCltx4buP2RJVnIbM
  • SPFv=spf1 redirect=6fqiiiuu._spf._d.mim.ec
  • jamf-site-verification=sg65EGuTghkkUCZ3dR3IYQ
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