Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rackspace.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 17:19:42 UTC · ↺ Refresh
MX Hostnames
- rackspace-com.mail.protection.outlook.com
MX Priorities
- rackspace-com.mail.protection.outlook.com: 10
A / AAAA Records
- 52.1.14.221 ↩ ec2-52-1-14-221.compute-1.amazonaws.com
- 3.227.192.229 ↩ ec2-3-227-192-229.compute-1.amazonaws.com
Mail Server IPs
- 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
- 52.101.8.42 ↩ mail-dm6pr03cu00402.inbound.protection.outlook.com
- 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
- 52.101.194.13 ↩ mail-ch0pr04cu00605.inbound.protection.outlook.com
- 2a01:111:f403:f90b:: ↩ mail-bn6pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c922::2 ↩ mail-bl0pr02cu00702.inbound.protection.outlook.com
- 2a01:111:f403:c946:: ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f805::1 ↩ mail-co1pr03cu00301.inbound.protection.outlook.com
SOA Record
Raw SOA
ns.rackspace.com hostmaster.rackspace.com 1774369536 300 300 1814400 300
Primary NS (mname)
ns.rackspace.com
Admin Email (rname)
hostmaster@rackspace.com
Serial
1774369536
Refresh
300s
Retry
300s
Expire
1814400s
Minimum TTL
300s
Nameservers (NS)
ns2.rackspace.com
ns.rackspace.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf_a.rackspace.com include:spf_b.rackspace.com include:spf.protection.outlook.com include:mailgun.org -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; fo=1; ri=3600; sp=reject; adkim=r; aspf=r; pct=100; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 6 found
selector1._domainkey
selector2._domainkey
mail._domainkey
k1._domainkey
s1._domainkey
s2._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
15 records- SPFv=spf1 include:spf_a.rackspace.com include:spf_b.rackspace.com include:spf.protection.outlook.com include:mailgun.org -all
- sophos-domain-verification=33beaba7a58282a665eab1fd66d3b1e0b865f2828c02d09ff22786c2f5300828
- google-site-verification=hjn98i9hop-Qu_6JSTrV7MGqNMuPkHqxQejxjBdK_AQ
- google-site-verification=gOBmNq8zRo0Mwju8NhdJUBMXfMHmux-XzMQ3obObp0c
- montycloud=c3091adfd00e6377b9eac694aef5e616
- docusign=f39f54dd-4993-4be2-8861-eeb5c9941875
- 16600baa-c8cf-4ce6-88c0-fc9fa3f6fd19
- MS=ms45524193
- atlassian-domain-verification=jMtVkwHW7SnBUnyWkLXlgEOcJOy1tSD6QM1hcjebXdrl1MF536MQ9FgaMyI8JYAX
- openai-domain-verification=dv-dfuARwBMBJPw1QgYwuMhlNGN
- y/6lk4AhKuCVb+XZ3YJGfT1oBfIEKfl2AMuwfmcR5RWKHTC/QbiiFqaveJTsUlYmrAjXGQZyYKWZsgTAGuCgzQ==
- 854ff9f7-193a-490d-a219-e559cd86c3ff
- anthropic-domain-verification-rnrfy1=fE0MMW8vO1OD2IpIwnxg9PQpy
- apple-domain-verification=fSW4Mu2Rukg86QP4
- google-site-verification=z2aDwPH4Lq9j_7Fj0U4Puz3hHk8wcpIuxMXZUI80kJc
Full email verification for rackspace.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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