l-3com.com

Valid Email Server
Domain Lookup › l-3com.com

Domain Overview

DNS: ✓ 17h ago Checker: ✓ 17h ago
l-3com.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-20 10:27:21 UTC · ↺ Refresh

MX Hostnames

  • mx.l3harris.com

MX Priorities

  • mx.l3harris.com: 10

A / AAAA Records

  • 192.124.8.190 ↩ f5-192-124-8-190.l3harris.com

Mail Server IPs

  • 128.170.196.38 ↩ usslc4rnpmx05pin.l3ht.com

SOA Record

Raw SOA mlb-ib-gm.net.harris.com dnsadmin.harris.com 136 10800 3600 2419200 900
Primary NS (mname)
mlb-ib-gm.net.harris.com
Admin Email (rname)
dnsadmin@harris.com
Serial
136
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
900s

Nameservers (NS)

dns01.l3harris.com
dns04.l3harris.com
dns03.l3harris.com
dns02.l3harris.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:128.170.196.0/25 ip4:166.20.196.0/25 ip4:192.52.235.32/27 ip4:128.170.207.0/24 ip4:35.169.203.92/32 ip4:52.227.183.169/32 include:spf.protection.outlook.com include:customers.clickdimensions.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 1 found
mail._domainkey
✓ Public key: 128 chars (valid)
✓ DKIM properly configured for selector: mail

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

4 records
  • MS=ms35131825
  • _8g7cdjlmg25g6et715zg5zgo75tk5ay
  • SPFv=spf1 ip4:128.170.196.0/25 ip4:166.20.196.0/25 ip4:192.52.235.32/27 ip4:128.170.207.0/24 ip4:35.169.203.92/32 ip4:52.227.183.169/32 include:spf.protection.outlook.com include:customers.clickdimensions.com -all
  • ex8Ytz45hpe3wYR4xhV+ExYmeRtFHG4QGaRfp+PvKbFj4J8tV7y0tMsyerzucz3o9dGmLr/hfjkWD9Gyu5M03Q==
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