Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gulfcoast.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 21:23:41 UTC · ↺ Refresh
MX Hostnames
- gulfcoast-edu.mail.protection.outlook.com
MX Priorities
- gulfcoast-edu.mail.protection.outlook.com: 0
A / AAAA Records
- 192.223.11.57 (no PTR)
Mail Server IPs
- 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
- 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
- 52.101.9.5 ↩ mail-mn2pr04cu00205.inbound.protection.outlook.com
- 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
- 2a01:111:f403:f804::3 ↩ mail-co1pr03cu00403.inbound.protection.outlook.com
- 2a01:111:f403:c946::6 ↩ mail-ch5pr02cu00406.inbound.protection.outlook.com
- 2a01:111:f403:c802:: ↩ mail-cy4pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-809.awsdns-37.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-809.awsdns-37.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1719.awsdns-22.co.uk
ns-462.awsdns-57.com
ns-809.awsdns-37.net
ns-1511.awsdns-60.org
SPF Record
✓ Strict (-all)
v=spf1 ip4:107.152.64.0/22 ip4:12.228.6.215/32 ip4:192.223.11.56/31 ip4:205.201.133.57/32 ip4:199.244.78.223/32 ip4:64.74.237.230/31 ip4:216.147.212.20/30 ip4:3.13.128.103/32 ip4:3.141.223.159/32 ip4:3.22.247.70/32 ip4:3.15.52.86/32 ip4:18.116.80.59/32 include:spf.protection.outlook.com a:emailus.freshservice.com include:spf.watermarkinsights.com include:email-od.com include:outboundmail.blackbaud.net include:_spf.alchemer.com include:spf.elluciancloud.com -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; adkim=r; aspf=r
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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
1 record- SPFv=spf1 ip4:107.152.64.0/22 ip4:12.228.6.215/32 ip4:192.223.11.56/31 ip4:205.201.133.57/32 ip4:199.244.78.223/32 ip4:64.74.237.230/31 ip4:216.147.212.20/30 ip4:3.13.128.103/32 ip4:3.141.223.159/32 ip4:3.22.247.70/32 ip4:3.15.52.86/32 ip4:18.116.80.59/32 include:spf.protection.outlook.com a:emailus.freshservice.com include:spf.watermarkinsights.com include:email-od.com include:outboundmail.blackbaud.net include:_spf.alchemer.com include:spf.elluciancloud.com -all
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