Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sigmacylinders.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-26 03:23:18 UTC · ↺ Refresh
MX Hostnames
- sigmacylinders-com.mail.protection.outlook.com
MX Priorities
- sigmacylinders-com.mail.protection.outlook.com: 0
A / AAAA Records
- 172.67.151.157 (no PTR)
- 104.21.0.252 (no PTR)
- 2606:4700:3037::6815:fc
- 2606:4700:3031::ac43:979d
Mail Server IPs
- 52.101.68.16 ↩ mail-db4pr02cu00400.inbound.protection.outlook.com
- 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
- 52.101.68.27 ↩ mail-db7pr03cu00503.inbound.protection.outlook.com
- 52.101.73.16 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
- 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca09:: ↩ mail-am3pr04cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca09::3 ↩ mail-am6pr04cu00303.inbound.protection.outlook.com
SOA Record
Raw SOA
carter.ns.cloudflare.com dns.cloudflare.com 2396518732 10000 2400 604800 1800
Primary NS (mname)
carter.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2396518732
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
erin.ns.cloudflare.com
carter.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf-uae.emailsignatures365.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;adkim=s;aspf=s;pct=100;fo=0:1:s:d;ri=3600;rua=mailto:[email protected];ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
2 records- google-site-verification=gsBzCN82HVaQSnsRnDU4-xrHsXTEqPp4tJrZufotA1E
- SPFv=spf1 include:spf.protection.outlook.com include:spf-uae.emailsignatures365.com -all
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