Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
teachfirst.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 03:28:40 UTC · ↺ Refresh
MX Hostnames
- teachfirst-de.mail.protection.outlook.com
MX Priorities
- teachfirst-de.mail.protection.outlook.com: 10
A / AAAA Records
- 185.175.196.89 (no PTR)
- 2a00:1c98:60:1300::757a:e6af (no PTR)
Mail Server IPs
- 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
- 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 52.101.73.22 ↩ mail-am7pr05cu00106.inbound.protection.outlook.com
- 52.101.73.30 ↩ mail-am7pr05cu00306.inbound.protection.outlook.com
- 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::2 ↩ mail-am0pr83cu00402.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
SOA Record
Raw SOA
pns01.dcsix.net hostmaster.dcsix.net 2026031801 14400 900 604800 900
Primary NS (mname)
pns01.dcsix.net
Admin Email (rname)
hostmaster@dcsix.net
Serial
2026031801
Refresh
14400s
Retry
900s
Expire
604800s
Minimum TTL
900s
Nameservers (NS)
pns01.dcsix.net
pns02.dcsix.net
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.zimpel.de include:_spf.salesforce.com include:servers.mcsv.net include:spf.protection.outlook.com include:_spf.salesforce.com a mx ~all
📊 DNS lookups: 7/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._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
5 records- SPFv=spf1 include:_spf.zimpel.de include:_spf.salesforce.com include:servers.mcsv.net include:spf.protection.outlook.com include:_spf.salesforce.com a mx ~all
- sendinblue-code:147392e979aa7f240bb959f9ea60b6b0
- sending_domain1112172=1fb65ea6c51ebfab9c926132b5a8859abecd6b39f76f248f08c7f759b8fd900d
- MS=ms22760312
- pardot1112172=160ddf87858b2f73b2e98b617ca8154a3fa86e0557cbacf4d99f025c1e3aba36
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