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hq.dhs.gov

Email infrastructure report · Last checked

Summary

hq.dhs.gov uses Self-hosted / Custom for email and has SPF, DKIM, and DMARC configured. It is a catch-all domain.

Mail provider

ProviderSelf-hosted / Custom self-hosted
Primary MXmxb-00376703.gslb.gpphosted.com

MX records

PriorityHostnameIPs
10mxb-00376703.gslb.gpphosted.com67.231.147.98
10mxa-00376703.gslb.gpphosted.com67.231.155.98

Authentication

SPF✓ Present -all
DKIM✓ Found (selectors: selector1)
DMARC✓ Present p=reject
Raw SPF record
v=spf1 ip4:160.1.76.32 ip4:216.128.251.155 ip4:128.129.88.18 ip4:208.73.191.37 ip4:208.73.184.44 include:spf.dhs.gov include:spf.protection.outlook.com include:spf-00376703.gpphosted.com -all
Raw DMARC record
v=DMARC1; p=reject; pct=100; rua=mailto:DMARC@hq.dhs.gov, mailto:reports@dmarc.cyber.dhs.gov; ruf=mailto:dmarc-forensics@hq.dhs.gov

Email behavior

Catch-all✓ Yes
Disposable✗ No
Free provider✗ No
STARTTLS✓ Supported
SMTP response590ms
SMTP banner220 mx0e-00376703.gpphosted.com ESMTP mfa-m0190660

What this means

This domain has strong email authentication. Messages claiming to come from @hq.dhs.gov can be cryptographically verified by recipients, making spoofing difficult. Deliverability for legitimate mail should be good.

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curl https://api.checkmail.dev/v1/verify \
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