Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sierracollege.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 22:21:09 UTC · ↺ Refresh
MX Hostnames
- sierracollege-edu.mail.protection.outlook.com
MX Priorities
- sierracollege-edu.mail.protection.outlook.com: 0
A / AAAA Records
- 207.62.230.95 (no PTR)
- 23.185.0.2 (no PTR)
- 207.62.230.159
- 2620:12a:8000::2
- 2620:12a:8001::2
Mail Server IPs
- 52.101.41.0 ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 52.101.41.56 ↩ mail-sj0pr21cu00100.inbound.protection.outlook.com
- 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
- 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:c801::1 ↩ mail-sn1pr0501cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f802::1 ↩ mail-sj2pr05cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
blue.foundationdns.com dns.cloudflare.com 2398209575 10000 2400 604800 1800
Primary NS (mname)
blue.foundationdns.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398209575
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
blue.foundationdns.net
blue.foundationdns.org
blue.foundationdns.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:207.62.231.30 include:verifymyfafsa.com include:servers.mcsv.net include:listserv.cccco.edu include:listserv.cccnext.net include:cresmanager.com include:secure.giftlegacy.com include:b.sierracollege.edu -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;sp=quarantine; rua=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
k1._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
17 records- adobe-idp-site-verification=be087916-3d93-45a8-977d-e6fd51c30963
- google-site-verification=z7X6b3Lf7z9RExOVy2w5wEWyPBFOJJAyPVjzZ2QMyUs
- apple-domain-verification=o96DJf0U48n9FT86
- SPFv=spf1 include:spf.protection.outlook.com ip4:207.62.231.30 include:verifymyfafsa.com include:servers.mcsv.net include:listserv.cccco.edu include:listserv.cccnext.net include:cresmanager.com include:secure.giftlegacy.com include:b.sierracollege.edu -all
- MS=ms50470068
- 4gerlcicpqj76sq0g6geege9mr
- amazonses:B6WWgRNmNc3pWDSxr+hOnVzV0uIoE4+vtXaLOKLemrM=
- 854sorp4vgnlk169o6so33h7ml
- MS=8597B51890B1CDB49CED6E2842E60637E1B52439
- atlassian-domain-verification=JdX2byMzYaLdb51o0RuQCW4aGDQa0l2tPtxassc3WkZp6x9kxBb5r7JQxbL4gzGg
- google-site-verification=vwYdzdtz1tIjvABbEkw0wdqUS4rRw24ou1f7lN3MHVM
- 8HIY3T2S06I+9GBdyOEBgmRB4eleqtT2AGyEGeIFXNlFgJ5tfpO+/eIhYDMSvFX2JABwmP4JPmX7WldJDdXi/g==
- bw=6zYxtDZngmkXKbhKNvw2ROdbGhKKYN556z00z4ciYEP2
- google-site-verification=9lTQ4ETSti8hitwR7nSW0gqJXk3tMor64tch64szFDc
- google-site-verification=22tWovqcDd5dV_h9fTE1uZZLNIxClVEnHPsxuggODj4
- google-site-verification=SNrl0rR6zHhsQfUhNuRla42M68SiuznMaVfN3v78C40
- jamf-site-verification=OWUrsEhX8ns1nid1gvq8uw
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