Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
arecibo.inter.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 12:47:55 UTC · ↺ Refresh
MX Hostnames
- arecibo-inter-edu.mail.protection.outlook.com
MX Priorities
- arecibo-inter-edu.mail.protection.outlook.com: 0
A / AAAA Records
- 173.201.74.27 ↩ ns54.domaincontrol.com
Mail Server IPs
- 52.101.10.8 ↩ mail-bn1pr04cu00100.inbound.protection.outlook.com
- 52.101.11.13 ↩ mail-sn1pr0501cu00205.inbound.protection.outlook.com
- 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 52.101.194.12 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c902::4 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 2a01:111:f403:f802::1 ↩ mail-sj2pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c801::1 ↩ mail-sn1pr0501cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-38.azure-dns.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1-38.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns2-38.azure-dns.net
ns3-38.azure-dns.org
ns4-38.azure-dns.info
ns1-38.azure-dns.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:164.42.166.16/32 ip4:24.139.168.76 ip4:164.42.102.51 ip4:164.42.166.19/32 ip4:67.230.91.85/32 mx a:webmail.arecibo.inter.edu include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;sp=quarantine;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];ri=86400;aspf=r;adkim=r;fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
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
4 records- ocargugo82ketjiidp4tlujbiv
- SPFv=spf1 ip4:164.42.166.16/32 ip4:24.139.168.76 ip4:164.42.102.51 ip4:164.42.166.19/32 ip4:67.230.91.85/32 mx a:webmail.arecibo.inter.edu include:spf.protection.outlook.com -all
- MS=ms58596973
- tk5qvpi1vgg03en9n6ecki98qp
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