Domain Overview
DNS: ✓ 1mo ago
Checker: ✓ 1mo ago
crst.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-06 12:05:03 UTC · ↺ Refresh
MX Hostnames
- crst-com.mail.protection.outlook.com
MX Priorities
- crst-com.mail.protection.outlook.com: 10
A / AAAA Records
- 151.101.66.159 (no PTR)
Mail Server IPs
- 52.101.42.16 ↩ mail-co1pr05cu00300.inbound.protection.outlook.com
- 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 52.101.50.10 ↩ mail-mw2pr02cu00502.inbound.protection.outlook.com
- 52.101.194.15 ↩ mail-ch4pr21cu00107.inbound.protection.outlook.com
- 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c91d::b ↩ mail-mw2pr02cu00603.inbound.protection.outlook.com
- 2a01:111:f403:f804::2 ↩ mail-co1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:c946::4 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
SOA Record
Raw SOA
ns10.dnsmadeeasy.com dns.dnsmadeeasy.com 2009011945 43200 3600 1209600 180
Primary NS (mname)
ns10.dnsmadeeasy.com
Admin Email (rname)
dns@dnsmadeeasy.com
Serial
2009011945
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns15.dnsmadeeasy.com
ns14.dnsmadeeasy.com
ns11.dnsmadeeasy.com
ns12.dnsmadeeasy.com
ns10.dnsmadeeasy.com
ns13.dnsmadeeasy.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
📊 DNS lookups: 1/10
~ 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
✓ 5 found
selector1._domainkey
selector2._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
12 records- SPFv=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
- google-site-verification=J8SEpuDhe0a5snUPxYGDOj1bI03rOTjsbMM-vtXNP0U
- twilio-domain-verification=7cc48a6487640bcbad3859378db6549a
- duo_sso_verification=AcCHa8TyBycHC4HSIYibcHGifCAZWDbzX4gKl8jOvvwSc1J8JbWXPFzzSO2xmvms
- pardot905942=498841ae0f9dff42046309a96875b8aa5c9f49225e9773f3ba4f7008d8e6d587
- smartsheet-site-validation=VFR_Qnky9rlC_lR9oK7JPP7i83HJAhj9
- docusign=71e27b75-11c3-49ea-9067-2953fdc081d7
- google-site-verification=E6nGEWL3TthWLquzjP0psdpEKqBz6Qws4VK9D-MrZ1U
- MS=ms30760219
- google-site-verification=eGZ6-yEua_EdrdVbD_Lt-DiQWtXUMEw-IP8EQbzdAZQ
- dm1jc2dgoqg93cmgej5lbua76c
- pandadoc-domain-verification=cfe9VV4qe2D65QhtrixHnP
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