Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
polytech.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 03:52:18 UTC · ↺ Refresh
MX Hostnames
- polytech-com.mail.protection.outlook.com
MX Priorities
- polytech-com.mail.protection.outlook.com: 0
A / AAAA Records
- 185.21.40.107 ↩ vm1057.enterprisecloud.nu
Mail Server IPs
- 52.101.68.29 ↩ mail-dbapr03cu00105.inbound.protection.outlook.com
- 52.101.68.39 ↩ mail-db7pr03cu00607.inbound.protection.outlook.com
- 52.101.73.15 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca09::7 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 2a01:111:f403:ca04::9 ↩ mail-db7pr03cu00601.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
SOA Record
Raw SOA
a.portsdns.se registry.ports.net 2026032500 10800 3600 604800 28800
Primary NS (mname)
a.portsdns.se
Admin Email (rname)
registry@ports.net
Serial
2026032500
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
28800s
Nameservers (NS)
b.portsdns.net
a.portsdns.se
SPF Record
✓ Strict (-all)
v=spf1 ip4:217.7.247.175 ip4:46.38.233.207 ip4:5.45.105.31 ip4:95.154.57.141 ip4:54.93.39.28 include:spf.eu.signature365.net include:spf.atlassian.net include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; adkim=s; aspf=s;
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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- atlassian-domain-verification=KoIpnbfvOIeaJZVaYeCWIS0sDalaAGYwb6Q6H0/khlNl47/DyOQLwWyjh2aeeICQ
- SPFv=spf1 ip4:217.7.247.175 ip4:46.38.233.207 ip4:5.45.105.31 ip4:95.154.57.141 ip4:54.93.39.28 include:spf.eu.signature365.net include:spf.atlassian.net include:spf.protection.outlook.com -all
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