Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
blackboard.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 02:40:07 UTC · ↺ Refresh
MX Hostnames
- blackboard-com.mail.protection.outlook.com
MX Priorities
- blackboard-com.mail.protection.outlook.com: 10
A / AAAA Records
- 20.85.72.68 (no PTR)
Mail Server IPs
- 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
- 52.101.194.3 ↩ mail-ch1pr04cu00103.inbound.protection.outlook.com
- 52.101.40.0 ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:c946::1 ↩ mail-ch1pr04cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f903:: (no PTR)
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
- 2a01:111:f403:c922:: ↩ mail-bl0pr03cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-719.awsdns-25.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-719.awsdns-25.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-337.awsdns-42.com
ns-719.awsdns-25.net
ns-1321.awsdns-37.org
ns-1824.awsdns-36.co.uk
SPF Record
✓ Strict (-all)
v=spf1 include:_netblocks.blackboard.com include:mh.blackboard.com include:spf.protection.outlook.com include:servers.mcsv.net include:eskerondemand.com include:49675397.spf08.hubspotemail.net include:_spf.salesforce.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];sp=reject
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
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
11 records- pfXrSz+R3xXW/7frt70I2B9I5Ji3XNr+ndfiptWw0SwRIwJT1lzgMyka1en34swjl1jIwlBlvCnBBnb4zI+5bA==
- rightscale-4938059c848a09deb829
- SPFv=spf1 include:_netblocks.blackboard.com include:mh.blackboard.com include:spf.protection.outlook.com include:servers.mcsv.net include:eskerondemand.com include:49675397.spf08.hubspotemail.net include:_spf.salesforce.com -all
- wiz-domain-verification=f2232774b0adf1fc08b8c0f3fd5cb5f261d73c37f381e65ec1d6b4c26b9b6a0b
- MS=ms40613892
- atlassian-domain-verification=sL0SeJrvzBUml3o/s27o80sReunbCTKElGcidHph2tiTaZ0nMg7YECa/wuQooaq/
- ca3-48cd68e33ded47618c454c158fa7dcaf
- docu-45723426-bedd-41e0-a6f0-664931fc3806
- google-site-verification=fTocuU2OdTBoe0z0NgNx_LFAThArXIONtFHyO--shKk
- google-site-verification=h4SDO4a-PJNaavz2JFzCHiOqtvcVJG-r2SSOSwVnZcw
- mixpanel-domain-verify=92235a82-8728-4950-9851-57c4eecd4342
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