Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tessco.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 06:24:29 UTC · ↺ Refresh
MX Hostnames
- tessco-com.mail.protection.outlook.com
MX Priorities
- tessco-com.mail.protection.outlook.com: 0
A / AAAA Records
- 23.23.75.223 ↩ ec2-23-23-75-223.compute-1.amazonaws.com
- 3.95.69.132 ↩ ec2-3-95-69-132.compute-1.amazonaws.com
Mail Server IPs
- 52.101.9.17 (no PTR)
- 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
- 52.101.41.54 ↩ mail-sj2pr05cu00506.inbound.protection.outlook.com
- 52.101.50.7 ↩ mail-co1pr21cu00207.inbound.protection.outlook.com
- 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com
- 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com
SOA Record
Raw SOA
dns1.cscdns.net hostmaster.cscdns.net 2014041970 900 600 604800 900
Primary NS (mname)
dns1.cscdns.net
Admin Email (rname)
hostmaster@cscdns.net
Serial
2014041970
Refresh
900s
Retry
600s
Expire
604800s
Minimum TTL
900s
Nameservers (NS)
dns1.cscdns.net
dns2.cscdns.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:152.186.128.96/30 ip4:204.148.77.108/30 ip4:63.122.173.64/26 ip4:108.15.104.0/24 include:spf.protection.outlook.com include:_spf.salesforce.com include:_spf.billtrust.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
21 records- 784b1310f9493cb99005d67da05efd7c
- google-site-verification=MtsOI-DgS8w34z7BW2NHkhVAGzd_y5m1QMl2LDPvOb8
- 7c3f9b6144773920217f447ab52e1b9c
- duo_sso_verification=vVAtdlBc68WXC0214y4Wf7de1ozsr1tUSCQjwk3DeTnkbtmKXDgUzH5lsoOEySIB
- globalsign-domain-verification=186035e5b1851d0bc70b28311554548a
- SPFv=spf1 ip4:152.186.128.96/30 ip4:204.148.77.108/30 ip4:63.122.173.64/26 ip4:108.15.104.0/24 include:spf.protection.outlook.com include:_spf.salesforce.com include:_spf.billtrust.com -all
- cisco-ci-domain-verification=675b29c27abb8d1795a21156f55f3acd53263c7988d6213e8735c802e31bdcdb
- ZOOM_verify_9lakxTnVnlqlzVtW2KoBOz
- google-site-verification=BGffiYcF_gHBJxnrkLzvg2U843w4AoGUkm8B0eZ4YMI
- MS=ms63585112
- pexip-ms-tenant-domain-verification=28ea5517-5bdf-453c-98ce-cbe6f4ddf5d9
- nitro-verification-code=MTg2MjEyODg1NDI2MDYzNTE5Mw==
- atlassian-domain-verification=VaEdAsEGVJc/oVn2fVz0sRvRf6v3hGOa6/FGAdMYXnlThK1dzhh/GkUR4Vbg8rS3
- globalsign-domain-verification=26c6da289dce8d0a7ca078c0e7a33c0b
- smartsheet-site-validation=W-7Wf3-VCg-54BTbhCMM60S2Z1dpP9hS
- 0ed1fe018a7fb7068be1ed46e989e3e23bc3a03e8d
- atlassian-domain-verification=WoAk1L2wwX0IMtT3W4TyGlJsZkzzJagseaRSQrDFUc4OjZpq5R36WGYXaxhhI3p1
- globalsign-domain-verification=f925b5c1225f97375f75a5b7edcfabe6
- apple-domain-verification=TDiJItmb8uDuoHFE
- _globalsign-domain-verification=Mhc8hDpnra5Hk8YDqd3e5uIaFYoAqFeYKaJs-b14ZH
- PSv21jXuScBtl+JmiOELN++g6uSv/1/hWgHnkHJwQ6ToB41zM14Htq8CRXApPJrzFDDHEDHJ6wltZoq2TCGhZw==
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