Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
golubcapital.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-30 04:52:31 UTC · ↺ Refresh
MX Hostnames
- golubcapital-com.mail.protection.outlook.com
MX Priorities
- golubcapital-com.mail.protection.outlook.com: 5
A / AAAA Records
- 141.193.213.20 (no PTR)
- 141.193.213.21 (no PTR)
Mail Server IPs
- 52.101.11.9 ↩ mail-sn1pr02cu00101.inbound.protection.outlook.com
- 52.101.10.1 ↩ mail-bn6pr02cu00301.inbound.protection.outlook.com
- 52.101.8.46 ↩ mail-dm6pr05cu00406.inbound.protection.outlook.com
- 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
- 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-01.azure-dns.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1-01.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns1-01.azure-dns.com
ns2-01.azure-dns.net
ns3-01.azure-dns.org
ns4-01.azure-dns.info
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:35.174.145.124 ip4:109.235.150.61 ip4:109.235.150.50 ip4:52.177.143.218 ip4:52.232.213.229 ip4:52.146.84.128/28 ip4:40.117.95.67 ip4:4.150.211.59 ip4:172.169.36.13 ip4:198.207.147.224/27 ip4:204.239.0.224/27 ip4:216.230.14.224/27 include:spf.protection.outlook.com include:_netblocks.eloqua.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100; fo=1;
✓ 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
15 records- pexip-portal-domain-verification=083091d0-c125-4bf7-859f-04a4fc40f32d
- pexip-ms-tenant-domain-verification=083091d0-c125-4bf7-859f-04a4fc40f32d
- SPFv=spf1 mx ip4:35.174.145.124 ip4:109.235.150.61 ip4:109.235.150.50 ip4:52.177.143.218 ip4:52.232.213.229 ip4:52.146.84.128/28 ip4:40.117.95.67 ip4:4.150.211.59 ip4:172.169.36.13 ip4:198.207.147.224/27 ip4:204.239.0.224/27 ip4:216.230.14.224/27 include:spf.protection.outlook.com include:_netblocks.eloqua.com -all
- mXDHi6x3+931rhbDNO5/NYQsj1Z333YgibEWxLTPcTaWNPo0uvK95l0milfhnw6eSm5HqBGIFtEp7xbC8ncPlg==
- MS=ms75003390
- perplexity-ai-domain-verification-vr71ac=5zg2BYxd0kTTKD4MMm3RaXd16
- google-site-verification=pggnMIcN5QOJlXJGOsZhLqLNNK3Xjh16kw4Q4ezY3l4
- onetrust-domain-verification=1b255167f7514d749fda738bbbd8630d
- google-site-verification=rZYCxvZ5u8uzZSL286sbLT2tXBYzgfjTRkcXzlTSX9A
- creatopy-domain-verification=a318ad7b-bce4-437f-bfd3-3a55a43c84b1
- apple-domain-verification=CRGDJzad99n21K9M
- apple-domain-verification=gtg9NmueD29rDBKxsOsYuOCeEqWv2ZMi3nxPh_Pv3u8
- docusign=1e8a427e-83dc-45ca-9286-b4d4faca2101
- infoblox-domain-mastery=525e27d6c2cd83c506103ee2929afdd3d137c2ea2aea171bc3e021701092069e1f
- amazon-business-verification=13e156d58e6d5f665ff4baddb27c7daeaec86a2f1acacdb5c43450e76a425ca3
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for golubcapital.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits