usps.gov

Valid Email Server
Domain Lookup › usps.gov

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
usps.gov
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-21 00:01:32 UTC · ↺ Refresh

MX Hostnames

  • mxa-0038fd02.gslb.gpphosted.com
  • mxb-0038fd02.gslb.gpphosted.com

MX Priorities

  • mxb-0038fd02.gslb.gpphosted.com: 10
  • mxa-0038fd02.gslb.gpphosted.com: 10

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 66.159.228.37 ↩ mx0f-0038fd02.gpphosted.com
  • 66.159.227.37 ↩ mx0e-0038fd02.gpphosted.com

SOA Record

Raw SOA dns141.usps.com domainadmin.imail.usps.gov 791853936 3600 1800 1209600 1800
Primary NS (mname)
dns141.usps.com
Admin Email (rname)
domainadmin@imail.usps.gov
Serial
791853936
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
1800s

Nameservers (NS)

dns082.usps.com
dns141.usps.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:56.0.84.0/24 ip4:56.0.103.0/24 ip4:56.0.143.0/24 ip4:56.0.146.0/24 ip4:56.0.86.0/24 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

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

All TXT Records

12 records
  • webexdomainverification.ERM0=2969cc97-b631-48e9-a0a2-19d73748510c
  • mgverify=d5e9a0f954450c1833d950f582162def7d15f362878b572d8b01d6879c693d9c
  • U0S4P86940
  • MH6e/G7XLU2niXRQkReKu3m7LLu99CVGHizxwkRgFwoNV6W2NvTVNmHBb7R3lwJKzV4AmSiUSvksq4mJD3NAcg==
  • 7yxnqcqlyvt7gsnzc265rhht81bq6188
  • docusign=d6abdee8-7254-4e21-a258-1852cb404a01
  • SPFv=spf1 ip4:56.0.84.0/24 ip4:56.0.103.0/24 ip4:56.0.143.0/24 ip4:56.0.146.0/24 ip4:56.0.86.0/24 include:spf.protection.outlook.com -all
  • 28z5w43cthhp0fp7r2wz2kdvzpc5qdtb
  • kzksv0tkhw73mw9sls64zb2rbvps2cd9
  • google-site-verification=OQ_VPfub4jwkGry5pP8aa9SIZZ2EMKDPIFf0chc5v_o
  • apple-domain-verification=jg8589RKn9CShT57
  • MS=ms24361233
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