Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mst.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 05:32:56 UTC · ↺ Refresh
MX Hostnames
- mst-com.mail.protection.outlook.com
MX Priorities
- mst-com.mail.protection.outlook.com: 0
A / AAAA Records
- 151.101.194.216 (no PTR)
- 151.101.66.216 (no PTR)
- 151.101.2.216
- 151.101.130.216
Mail Server IPs
- 52.101.170.0 ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
- 52.101.170.2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 52.101.168.0 ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 52.101.170.1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 2a01:111:f403:ca2d::2 ↩ mail-fr6p281cu00202.inbound.protection.outlook.com
- 2a01:111:f403:ca2d::1 ↩ mail-fr4p281cu03101.inbound.protection.outlook.com
- 2a01:111:f403:ca27:: ↩ mail-beup281cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca2d:: ↩ mail-fr5p281cu00500.inbound.protection.outlook.com
SOA Record
Raw SOA
ns01.versatel.de hostmaster.1und1.net 2026021800 10000 3600 604800 86400
Primary NS (mname)
ns01.versatel.de
Admin Email (rname)
hostmaster@1und1.net
Serial
2026021800
Refresh
10000s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns03.versatel.de
ns02.versatel.de
ns01.versatel.de
SPF Record
✓ Strict (-all)
v=spf1 ip4:91.204.8.0/24 include:_spf.eu.sparkpostmail.com include:aspmx.pardot.com include:_spf.salesforce.com include:successfactors.eu include:spf.protection.outlook.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 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
5 records- ms-domain-verification=a1a9dfc3-9e98-462f-8402-0ef7af5a3a4b
- pardot937763=72fdb7c8b04074484823fffd88a475f5ccbca0efb23f00fa7b956eb61b126e2e
- atlassian-domain-verification=9x0aGkbwqaZ9kfqalVp3uF4csXRJOEMUUa02HNg/AaOR5daw8jbu2llQOXhaNZTV
- public-suffix-root=mst.com
- SPFv=spf1 ip4:91.204.8.0/24 include:_spf.eu.sparkpostmail.com include:aspmx.pardot.com include:_spf.salesforce.com include:successfactors.eu include:spf.protection.outlook.com -all
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