Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
krostcpas.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 10:24:53 UTC · ↺ Refresh
MX Hostnames
- krostcpas-com.mail.protection.outlook.com
MX Priorities
- krostcpas-com.mail.protection.outlook.com: 10
A / AAAA Records
- 35.209.183.198 ↩ 198.183.209.35.bc.googleusercontent.com
Mail Server IPs
- 52.101.40.6 ↩ mail-cy1pr03cu00106.inbound.protection.outlook.com
- 52.101.9.14 ↩ mail-bl0pr03cu00206.inbound.protection.outlook.com
- 52.101.9.24 ↩ mail-bl2pr02cu00400.inbound.protection.outlook.com
- 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c902::14 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
- 2a01:111:f403:f804::3 ↩ mail-co1pr03cu00403.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.siteground.net root.siteground.net 100520 86400 7200 3600000 86400
Primary NS (mname)
ns1.siteground.net
Admin Email (rname)
root@siteground.net
Serial
100520
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
86400s
Nameservers (NS)
ns2.siteground.net
ns1.siteground.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.exclaimer.net include:krostcpas.com.spf.auto.dnssmarthost.net include:4827375.spf07.hubspotemail.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;rua=mailto:[email protected];ruf=mailto:[email protected];
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- SPFv=spf1 include:spf.protection.outlook.com include:spf.exclaimer.net include:krostcpas.com.spf.auto.dnssmarthost.net include:4827375.spf07.hubspotemail.net -all
- google-site-verification=5pjUEpLp0REPArNwfseQJtRidRBCtQgpBEHyov_12q4
- h119qi9bpk3e60gbouluqn6vl5
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