Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mastercorp.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 05:14:28 UTC · ↺ Refresh
MX Hostnames
- mastercorp-com.mail.protection.outlook.com
- surveymonkey.mx.e.sparkpost.com
MX Priorities
- mastercorp-com.mail.protection.outlook.com: 0
- surveymonkey.mx.e.sparkpost.com: 10
A / AAAA Records
- 34.174.59.175
Mail Server IPs
- 52.101.9.11 ↩ mail-bl2pr04cu00103.inbound.protection.outlook.com
- 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
- 52.101.10.8 ↩ mail-bn1pr04cu00100.inbound.protection.outlook.com
- 52.101.9.14 ↩ mail-bl0pr03cu00206.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f909:: ↩ mail-bn6pr04cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f902::2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c902::2 ↩ mail-sj0pr03cu01602.inbound.protection.outlook.com
- 34.210.196.194 ↩ ec2-34-210-196-194.us-west-2.compute.amazonaws.com
- 44.227.204.14 ↩ ec2-44-227-204-14.us-west-2.compute.amazonaws.com
- 34.215.78.121
- 35.160.211.128
- 44.254.245.137
- 52.10.163.53
SOA Record
Raw SOA
ns1.siteground.net admins.siteground.com 622 86400 7200 3600000 86400
Primary NS (mname)
ns1.siteground.net
Admin Email (rname)
admins@siteground.com
Serial
622
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
86400s
Nameservers (NS)
ns2.siteground.net
ns1.siteground.net
SPF Record
✓ Soft Fail (~all)
v=spf1 include:sendgrid.net include:spf.protection.outlook.com include:spf.smtp2go.com include:spf-us.emailsignatures365.com include:spf.happyfox.com include:_spf.salesforce.com include:_spf.e.sparkpost.com include:us._netblocks.mimecast.com a:mail.mastercorp.com ~all
📊 DNS lookups: 9/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; rf=afrf; pct=100
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._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
12 records- 1c008bbeba5d43bfb49eceb45ac4da3f
- atlassian-domain-verification=jCDuIsZRyEJ4bplDpnxzOtR9vtjJ7iUNoe0CUMgDICOIvWJ6I3OQ0QaYqOZ0qcra
- _j1mhqo1c6k8k3psizje636kkxva0j0b
- 0ed1fe018a272f81f5a2d94afba961ad8cc9c69c41
- MS=ms37175837
- bw=GlTid4bmai8sZVQqlZdlEcdtBop3lgwu1irs604g1efC
- google-site-verification=14XpOumxjS4_EYFj3uchQIzcmnpLnH7cn40naPalK9k
- apple-domain-verification=Fr06pwL0T6Qwju2g
- SPFv=spf1 include:sendgrid.net include:spf.protection.outlook.com include:spf.smtp2go.com include:spf-us.emailsignatures365.com include:spf.happyfox.com include:_spf.salesforce.com include:_spf.e.sparkpost.com include:us._netblocks.mimecast.com a:mail.mastercorp.com ~all
- atlassian-domain-verification=yuu4lZxWZ0oQY54BFK9mcmPpAsKBfs/C0K8GV/J25RJK3+W9YLRg6itHqXjgNCGu
- ZOOM_verify_30gglmVii0KxdDwG7vOQ6l
- klaviyo-site-verification=ReqwjG
Full email verification for mastercorp.com
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