Domain Overview
DNS: ✓ 2h ago
Checker: ✓ 2h ago
opensistemas.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 02:56:06 UTC · ↺ Refresh
MX Hostnames
- alt3.aspmx.l.google.com
- alt4.aspmx.l.google.com
- aspmx.l.google.com
- alt1.aspmx.l.google.com
- opensistemas-com.mail.protection.outlook.com
- alt2.aspmx.l.google.com
MX Priorities
- opensistemas-com.mail.protection.outlook.com: 30
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
A / AAAA Records
- 162.55.155.40
Mail Server IPs
- 52.101.73.16 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
- 52.101.68.21 ↩ mail-db4pr02cu00205.inbound.protection.outlook.com
- 52.101.73.1 ↩ mail-am3pr04cu00501.inbound.protection.outlook.com
- 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
- 2a01:111:f403:ca09::3 ↩ mail-am6pr04cu00303.inbound.protection.outlook.com
- 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
- 2a01:111:f403:ca09::8 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.27
- 2a00:1450:400b:c02::1b
- 172.253.122.26
- 2607:f8b0:4004:c27::1a
- 192.178.223.26
- 2a00:1450:4009:c0f::1a
SOA Record
Raw SOA
jacqueline.ns.cloudflare.com dns.cloudflare.com 2404360757 10000 2400 604800 1800
Primary NS (mname)
jacqueline.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2404360757
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
rob.ns.cloudflare.com
jacqueline.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:servers.mcsv.net include:spf.protection.outlook.com include:amazonses.com ~all
📊 DNS lookups: 4/10
~ 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
✓ 4 found
google._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
9 records- google-site-verification=Kv3J4qVk0KfAoPN6TqhlNj48eWudSkEYVU0lnroWWKs
- google-site-verification=RlESziE0qpVYBGLEQ1JhizcqDh_A63XgAAZxDhY1nuo
- google-site-verification=Vndv9STnAXDoxEmYwk42MJwcbaTcPnaUqI6_alZxMzs
- ms=yg6-sd9-67j
- SPFv=spf1 include:_spf.google.com include:servers.mcsv.net include:spf.protection.outlook.com include:amazonses.com ~all
- yg6-sd9-67j
- MS=ms30226294
- amazonses:nl7n8puxl3sW3gcuJ1l2AvnsZQtV8lZbCKvmrLun4E0=
- facebook-domain-verification=ftnxjmed13qe2tdyo2b5v37aopdtti
Full email verification for opensistemas.com
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