class101.com

Valid Email Server
Domain Lookup › class101.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
class101.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-17 19:58:52 UTC · ↺ Refresh

MX Hostnames

  • aspmx3.googlemail.com
  • aspmx.l.google.com
  • alt1.aspmx.l.google.com
  • alt2.aspmx.l.google.com
  • aspmx2.googlemail.com

MX Priorities

  • aspmx.l.google.com: 10
  • alt2.aspmx.l.google.com: 30
  • aspmx2.googlemail.com: 40
  • aspmx3.googlemail.com: 50
  • alt1.aspmx.l.google.com: 20

A / AAAA Records

  • 141.193.213.21 (no PTR)
  • 141.193.213.20 (no PTR)

Mail Server IPs

  • 172.253.115.26 ↩ bg-in-f26.1e100.net
  • 2607:f8b0:4004:c1d::1b ↩ ww-in-f27.1e100.net
  • 172.253.116.26 ↩ dj-in-f26.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
  • 108.177.123.27 ↩ lcscld-in-f27.1e100.net
  • 2800:3f0:4003:c0f::1a (no PTR)
  • 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
  • 2800:3f0:4003:c0f::1b (no PTR)

SOA Record

Raw SOA ns27.domaincontrol.com dns.jomax.net 2024050200 28800 7200 604800 600
Primary NS (mname)
ns27.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2024050200
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns28.domaincontrol.com
ns27.domaincontrol.com

SPF Record

✗ Missing

No SPF record — domain is unprotected against spoofing.

⚠ No SPF record found. Email servers cannot verify authorized senders.

DMARC Record

✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✓ 3 found
google._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

4 records
  • box-domain-verification=370ce76948848e112b3fc58c4dff118ab6cbc13c5fa9327c52835864a5bce084
  • knowbe4-site-verification=c4133e55ea8542f319d0a0ef8d6caa24
  • google-site-verification=pzBlsR7D-N8d1sb6H9by8CxxxFo7SOi02ytTA7_R6SM
  • google-site-verification=K1fFguTZvkdBhlsWuh7zgHNfnnft4Fkcuc7-L2Z6Dag
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