Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
1stsource.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 12:46:33 UTC · ↺ Refresh
MX Hostnames
- 1stsource-com.mail.protection.outlook.com
MX Priorities
- 1stsource-com.mail.protection.outlook.com: 0
A / AAAA Records
- 104.18.29.226 (no PTR)
- 104.18.28.226 (no PTR)
- 2606:4700::6812:1de2
- 2606:4700::6812:1ce2
Mail Server IPs
- 40.93.192.1 ↩ mail-dm5pr02cu00201.inbound.protection.outlook.com
- 52.101.41.56 ↩ mail-sj0pr21cu00100.inbound.protection.outlook.com
- 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
- 52.101.9.14 ↩ mail-bl0pr03cu00206.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c931:: ↩ mail-sn1pr02cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
- 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
SOA Record
Raw SOA
henrik.ns.cloudflare.com dns.cloudflare.com 2398887068 10000 2400 604800 1800
Primary NS (mname)
henrik.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398887068
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
henrik.ns.cloudflare.com
jocelyn.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:1stsource.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
7 records- SPFv=spf1 include:1stsource.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
- apple-domain-verification=RKyw9M6BGni9skQnzC1YbTdsL21KkoasyoSbVJKJLk8
- atlassian-domain-verification=apvKCklAteXf4o8ENr/PgZuw6puQKPpJiIW3j/Cf9/2qc3AfkwOTNbwHradTjubH
- cisco-ci-domain-verification=1e69659ca52011200b89ec644bea78945b8cda366eb84c25e60e985cd0c26e83
- docusign=bd154c56-c182-4cf7-a9a9-d8c70d62574e
- google-site-verification=GNkNN0bbHyEoXJxKgWIOfEei9TTSZQSPUj0M59gPKcw
- iContact1781245
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