Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gsu.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-06 11:49:29 UTC · ↺ Refresh
MX Hostnames
- gsu-edu.mail.protection.outlook.com
MX Priorities
- gsu-edu.mail.protection.outlook.com: 0
A / AAAA Records
- 104.239.136.235 (no PTR)
Mail Server IPs
- 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
- 52.101.11.3 ↩ mail-sn1pr0501cu00103.inbound.protection.outlook.com
- 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
- 52.101.9.24 ↩ mail-bl2pr02cu00400.inbound.protection.outlook.com
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
- 2a01:111:f403:f901:: ↩ mail-mn2pr04cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com
- 2a01:111:f403:c946::1 ↩ mail-ch1pr04cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
dns-hm1.gsu.edu root.sphinx.gsu.edu 793524084 1200 180 2419200 3600
Primary NS (mname)
dns-hm1.gsu.edu
Admin Email (rname)
root@sphinx.gsu.edu
Serial
793524084
Refresh
1200s
Retry
180s
Expire
2419200s
Minimum TTL
3600s
Nameservers (NS)
ns3.usg.edu
ns2.usg.edu
ns1.usg.edu
dns-ext2.gsu.edu
dns-ext1.gsu.edu
ns4.usg.edu
SPF Record
✓ Strict (-all)
v=spf1 ip4:131.96.2.42 ip4:131.96.2.41 include:spfb.gsu.edu a:c.spf.service-now.com include:spf.protection.outlook.com include:_spf.qualtrics.com include:_spf.qp-mail.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
k1._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
24 records- sophos-domain-verification=d6c16885c358ba6d3ee6126c402dda4338e9df5ac54bfc7b12abca21ad2cda49
- SPFv=spf1 ip4:131.96.2.42 ip4:131.96.2.41 include:spfb.gsu.edu a:c.spf.service-now.com include:spf.protection.outlook.com include:_spf.qualtrics.com include:_spf.qp-mail.com -all
- atlassian-domain-verification=VVbSS/Y2WMZfMxihvmT2ZWmpKKl0aL5DWjuhvtJ9iHl6ZRH84TzGqWg32Wza/zdQ
- amazonses:HB55EuACTyzG7s5+kLC/m1WtLeWL8a1JzmiC+BgQWUQ=
- adobe-sign-verification=e7c1b471b1f28f251ec0776519d31f6
- amazonses:rCkC5i8vgdVpE+wG8IaPyOv80oDn2yk58U3Pp9pqQMU=
- dell-technologies-domain-verification=gsu.edu_ad9a35e4-563a-4f5d-9038-6b32008d6671_1685757693
- ciscocidomainverification=581df163e549b4dd0af62da736f22f71d57c7465f65326947f17fa0d1807fe22
- adobe-idp-site-verification=42a7a470-0872-4bc3-9dca-3bd86be2b827
- pardot1063302=a19847b311594f77ef9f1b694eff2c9271894a13c97bfc11d492a0292ae52f7c
- extensis-domain-verification=69f52821-6dc8-42ab-bed4-4395d81672d8
- ZOOM_verify_zVdgrBt5eeVm44BLbwitaG
- airtable-verification=efeaf8833477d2d9879bdd94baeefb2c
- ZOOM_verify_0ceLYS5ZAMdZHYawEPctdg
- sending_domain1063302=78e8cb8b01e2acd81fb8e5f6b1d708d682c9e3f041963dc4197f8c550ae0c4ca
- webexdomainverification.4C675B8BA984B136E053AB06FC0A3F65=7c65b3e8-fcaf-43ee-814d-1c52e901b8d9
- d365mktkey=mqUdtEp5EcWewOjB1eNFtBNx0AKDQxnrpYX2DAwv2MYx
- canva-site-verification=kGZHfH2WfmkP6KayA9DobA
- airtable-verification=ad852c88ee36576a632db7137ed8fffe
- status-page-domain-verification=m3rrrd4cykwp
- smartsheet-site-validation=hgGKpzO7QaB4nKY76xMjMpykc3WDvVXO
- apple-domain-verification=zoLqJCVLKqC7TQMN
- d365mktkey=yvv72jNHFQxWycEXMxgN256ZcfQ8Ta2pZMfxE8H6A7Ex
- facebook-domain-verification=7469k9durhf0gpvqh5f3589pau5cwa
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for gsu.edu
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits