Domain Overview
DNS: ✓ 4h ago
Checker: ✓ 4h ago
mainstreamdata.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-20 21:11:39 UTC · ↺ Refresh
MX Hostnames
- mainstreamdata-com.mail.protection.outlook.com
MX Priorities
- mainstreamdata-com.mail.protection.outlook.com: 0
A / AAAA Records
- 99.83.181.15 ↩ a8761e274976ba4eb.awsglobalaccelerator.com
Mail Server IPs
- 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
- 52.101.40.6 ↩ mail-cy1pr03cu00106.inbound.protection.outlook.com
- 52.101.41.28 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 52.101.9.5 ↩ mail-mn2pr04cu00205.inbound.protection.outlook.com
- 2a01:111:f403:f905::3 ↩ mail-dm5pr02cu00203.inbound.protection.outlook.com
- 2a01:111:f403:c92c::4 ↩ mail-dm6pr05cu00404.inbound.protection.outlook.com
- 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:f903:: (no PTR)
SOA Record
Raw SOA
adrian.ns.cloudflare.com dns.cloudflare.com 2402580256 10000 2400 604800 1800
Primary NS (mname)
adrian.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2402580256
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
trevor.ns.cloudflare.com
adrian.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:209.63.42.0/24 ip4:70.102.230.0/23 ip4:67.50.119.0/24 ip4:31.221.111.128/27 ip4:65.49.23.0/24 ip4:72.52.119.64/26 ip4:52.26.83.233 ip6:2603:10b6::/32 include:spf.protection.outlook.com mx a:nexus1.mainstreamdata.com a:nexus2.mainstreamdata.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ 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: 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
4 records- SPFv=spf1 ip4:209.63.42.0/24 ip4:70.102.230.0/23 ip4:67.50.119.0/24 ip4:31.221.111.128/27 ip4:65.49.23.0/24 ip4:72.52.119.64/26 ip4:52.26.83.233 ip6:2603:10b6::/32 include:spf.protection.outlook.com mx a:nexus1.mainstreamdata.com a:nexus2.mainstreamdata.com -all
- DCiEMVdM/B3LFdBUkCyi+ihVahiX8SY8/fR6XP2r6tpd3X056fVQKtxoeoWsqZZDNQnB9299y6NsiZmuFMvqUQ==
- MS=ms42215063
- spf2.0/pra
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