Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mantech.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 17:13:22 UTC · ↺ Refresh
MX Hostnames
- alt4.aspmx.l.google.com
- alt2.aspmx.l.google.com
- aspmx.l.google.com
- alt1.aspmx.l.google.com
- alt3.aspmx.l.google.com
MX Priorities
- alt2.aspmx.l.google.com: 5
- alt4.aspmx.l.google.com: 10
- alt3.aspmx.l.google.com: 10
- aspmx.l.google.com: 1
- alt1.aspmx.l.google.com: 5
A / AAAA Records
- 23.48.224.100
- 23.48.224.105
- 2600:141b:1c00:36::17d2:5ca8
- 2600:141b:1c00:36::17d2:5cb1
Mail Server IPs
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
- 173.194.76.27 ↩ ws-in-f27.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-f26.1e100.net
- 192.178.223.27 ↩ yulhrs-in-f27.1e100.net
- 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
- 142.251.163.26 ↩ wv-in-f26.1e100.net
- 2607:f8b0:4004:c23::1b ↩ yuiadrs-in-f27.1e100.net
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
SOA Record
Raw SOA
a1-210.akam.net hostmaster.mantech.com 2025022736 3600 600 604800 300
Primary NS (mname)
a1-210.akam.net
Admin Email (rname)
hostmaster@mantech.com
Serial
2025022736
Refresh
3600s
Retry
600s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
a20-64.akam.net
a18-67.akam.net
a1-210.akam.net
a4-66.akam.net
a13-66.akam.net
a11-65.akam.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:108.174.251.190 ip6:2001:489a:200::/48 include:spf.protection.outlook.com include:spf.protection.office365.us include:oktamail.mantech.com include:spfa.navexglobal.com include:_spf.google.com include:_spf.salesforce.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 5 found
google._domainkey
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
18 records- _6zgj2sboi8o34mcf4p6s4giiwwh8ev6
- SPFv=spf1 ip4:108.174.251.190 ip6:2001:489a:200::/48 include:spf.protection.outlook.com include:spf.protection.office365.us include:oktamail.mantech.com include:spfa.navexglobal.com include:_spf.google.com include:_spf.salesforce.com -all
- cursor-domain-verification-5s0b14=7NIEi1EDzKfrcYFE507pELYSb
- google-site-verification=zSzKTZM7JJRIiGnTCE69Py97EkMH3t9QBAwA0HrFT-4
- cisco-ci-domain-verification=4997c09f77c2179aef21b3a7d3562071b7f0a945e643872ba9fed9c347cd3bf9
- google-site-verification=ahNCGvyPMnj-on28vai4EsmXGjoxUVEAVT6qFaLFDwk
- canva-site-verification=ODGKnWqnUwz6FcgkTNXr4Q
- openai-domain-verification=dv-K2Gm13zBEdE4fxQBmsnCXejz
- jamf-site-verification=lfZ8kcSdODNGoT7YuYFKOQ
- asv=76822817466c7762e0cc224d32c2463f
- mentimeter-78098e47-d568-40e4-9fa8-af3eeddb24b3
- infoblox-domain-mastery=c745592f03cd0a1400eba5cd7d7f640ecb2d03ea8c7dd03d2896473adbacffb653
- _3x5eh5xw5ru37jywecvdc97vrlhp2oo
- smartsheet-gov-site-validation=AdUkvGBMJfSVQogeG0QTDTzpG2b3FU9_
- onetrust-domain-verification=bdcdb890f3b44e328627b5f43ee0fc56
- apple-domain-verification=WFssRPyk2F6rMUve
- have-i-been-pwned-verification=981dc828431ce5a51516c0a57c0d1c718
- ecostruxure-it-verification=41ff7469-e9c5-49d5-a128-611542cfe3ef
Full email verification for mantech.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits