gustavus.edu

Valid Email Server
Domain Lookup › gustavus.edu

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
gustavus.edu
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-26 06:12:20 UTC · ↺ Refresh

MX Hostnames

  • ASPMX3.GOOGLEMAIL.COM
  • ASPMX.L.GOOGLE.COM
  • ASPMX2.GOOGLEMAIL.COM
  • ALT1.ASPMX.L.GOOGLE.COM
  • ALT2.ASPMX.L.GOOGLE.COM

MX Priorities

  • aspmx.l.google.com: 1
  • aspmx3.googlemail.com: 10
  • aspmx2.googlemail.com: 10
  • alt2.aspmx.l.google.com: 5
  • alt1.aspmx.l.google.com: 5

A / AAAA Records

  • 138.236.1.12
  • 2606:8fc0::1012

Mail Server IPs

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

SOA Record

Raw SOA dns100.gac.edu hostmaster.gac.edu 202603240 3600 3600 1209600 3600
Primary NS (mname)
dns100.gac.edu
Admin Email (rname)
hostmaster@gac.edu
Serial
202603240
Refresh
3600s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

farmhand.gac.edu
secondary.gustavus.edu
dns100.gac.edu
dns101.gac.edu

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:138.236.127.0/24 ip4:138.236.128.0/24 ip4:138.236.0.0/23 ip6:2606:8fc0::/64 ip6:2620:46:8000:127::/64 ip6:2620:46:8000:128::/64 include:_spf.google.com ~all
📊 DNS lookups: 1/10

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected], mailto:[email protected]; ruf=mailto:[email protected]; sp=quarantine; aspf=r; fo=0:1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected], mailto:[email protected]
↳ Subdomain policy: quarantine

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

8 records
  • SPFv=spf1 ip4:138.236.127.0/24 ip4:138.236.128.0/24 ip4:138.236.0.0/23 ip6:2606:8fc0::/64 ip6:2620:46:8000:127::/64 ip6:2620:46:8000:128::/64 include:_spf.google.com ~all
  • facebook-domain-verification=32tv11i0m5b76ul93kvnaa0ww6eccv
  • adobe-idp-site-verification=4f0860d98385c1f1993416d59e65797acc7ea8527bbbddd5fcf7e6b09baf4f46
  • apple-domain-verification=6nDNBxZYwxrOqVVw
  • google-site-verification=SUE43Hp_96bkqh1q_CABheei3CEoz09Cgo9ZESq91iQ
  • FQBPELHHQZLATKSNDT73MF23RQ8UQSBV2V1BG8LAQ
  • google-site-verification=_5ohyo0wSkokDa95ZsN17NymgclSHQ-s7LOvvoDofMo
  • google-site-verification=_QiePrnsBMq2I60Y6m2--ZKJvpL7LqtNKanGHcUldDE
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