oreilly.com

Valid Email Server
Domain Lookup › oreilly.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
oreilly.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-28 15:28:20 UTC · ↺ Refresh

MX Hostnames

  • aspmx2.googlemail.com
  • alt1.aspmx.l.google.com
  • alt2.aspmx.l.google.com
  • aspmx3.googlemail.com
  • aspmx.l.google.com

MX Priorities

  • aspmx3.googlemail.com: 10
  • aspmx.l.google.com: 1
  • alt1.aspmx.l.google.com: 5
  • aspmx2.googlemail.com: 10
  • alt2.aspmx.l.google.com: 5

A / AAAA Records

  • 34.169.83.167 ↩ 167.83.169.34.bc.googleusercontent.com

Mail Server IPs

  • 172.253.116.26 ↩ dj-in-f26.1e100.net
  • 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
  • 172.253.122.27 ↩ bh-in-f27.1e100.net
  • 2607:f8b0:4004:c21::1a ↩ pe-in-f26.1e100.net
  • 108.177.123.27 ↩ lcscld-in-f27.1e100.net
  • 2800:3f0:4003:c0f::1b (no PTR)
  • 2800:3f0:4003:c0f::1a (no PTR)
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net

SOA Record

Raw SOA a1-225.akam.net nic-tc.oreilly.com 2147484368 600 1800 5184000 3600
Primary NS (mname)
a1-225.akam.net
Admin Email (rname)
nic-tc@oreilly.com
Serial
2147484368
Refresh
600s
Retry
1800s
Expire
5184000s
Minimum TTL
3600s

Nameservers (NS)

a13-64.akam.net
a20-66.akam.net
a16-65.akam.net
a4-64.akam.net
a1-225.akam.net
a3-67.akam.net

SPF Record

✓ Strict (-all)
v=spf1 include:_spf.google.com include:amazonses.com include:spf.mandrillapp.com include:spf.mtasv.net include:mktomail.com include:_spf.salesforce.com ip4:199.27.144.40 ip4:199.83.45.18 ip4:199.83.45.19 ip4:199.83.45.110 ip4:199.83.45.111 ip4:199.83.47.124 ip4:199.83.47.125 ip4:162.42.207.20 ip4:208.76.31.37 ip4:162.42.214.212 ip4:104.192.140.117 ip4:72.18.192.0/24 ip4:66.179.217.0/26 ip4:173.209.243.64/26 -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=20; sp=none;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
⚠ Policy applies to 20% of failing messages only

DKIM Selectors

✓ 3 found
google._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 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

35 records
  • logmein-verification-code=35fc191f-9043-4216-8bf4-88a05c9e8768
  • docker-verification=993bde06-01c2-4c04-a1c6-d840bddb0611
  • _figma_sites_verify_customersuccess
  • MS=E75517AC6D8C7C76D0C87E3CF6ABD5F68B91610C
  • MS=ms79198677
  • ZOOM_verify_t_KNmIKiQZKkyVMeJxpjnA
  • onetrust-domain-verification=54ccc7392b084e48acfcbc164e2a0ba6
  • SPFv=spf1 include:_spf.google.com include:amazonses.com include:spf.mandrillapp.com include:spf.mtasv.net include:mktomail.com include:_spf.salesforce.com ip4:199.27.144.40 ip4:199.83.45.18 ip4:199.83.45.19 ip4:199.83.45.110 ip4:199.83.45.111 ip4:199.83.47.124 ip4:199.83.47.125 ip4:162.42.207.20 ip4:208.76.31.37 ip4:162.42.214.212 ip4:104.192.140.117 ip4:72.18.192.0/24 ip4:66.179.217.0/26 ip4:173.209.243.64/26 -all
  • onetrust-domain-verification=ae63e0829f794f8eaa9d46794a8e6073
  • stripe-verification=f9c7baf61f54571ffe67b1c557dea5380c1afd51153b97ca71724438405f855b
  • OczFEA1OJs6vDuh7lvXFAcHDrCMg0Bgq35GaGBcrZqs
  • google-site-verification=0QeIVzKsJaBLMuz3ZQ1rVpVCmumDKYRlvZ8fRExJ81Y
  • openai-domain-verification=dv-ZU9jzgezaEHhPW3jhinsYiGi
  • _yikoj59erdx9jd4sti8idhii7nvf9x2
  • apple-domain-verification=CObFhoTOkqx87oIs
  • d7kfp9gbnkkvp5vvphuv80s4oc
  • cloudhealth=45f9c4a4-d1eb-4252-b4a1-7d7bb9004040
  • pardot1009792=4c05d6fbc27aa34baa25bd9d175c4f3be8941b4c77ce5fba6e78022fdfe194fb
  • calendly-site-verification=KRdabjWvHMSpj0d7HZ7WgAZXIGkbywfZWqJCGrIYd
  • MS=ms43057904
  • adobe-idp-site-verification=ad56f341-bb17-4470-8efa-9a9b9c121a4a
  • zapier-domain-verification-challenge=6257ac03-13a2-49f0-bf05-cff1cac20573
  • 1g9d3pyyw5xdhpty461591rx8qtp6y6z
  • BlueXPf24d34d4-6c8c-4419-b3be-53abc864b788
  • anthropic-domain-verification-dnrkbn=q9EUze0gStRgj4wmYfJUGB6V2
  • stripe-verification=FA0A5DF1B861B5632D3B866D38C3327CB0C01D0591C3FAE956610D4BC68DEA64
  • globalsign-domain-verification=aei6eSS-1p0PqmZ3x4jXFoJt_7l6MenGY6u2FV45qG
  • m7zd1crqvftqsgdf8v889l9zdqhk3p07
  • smartsheet-site-validation=fxm70bCfI2yjd4sAuYUP7eTOck334VGo
  • 1password-site-verification=YL4MABUTMFAGTAOZTL6TFWZWBU
  • openai-domain-verification=dv-p9JzdykFvVDoSGxyY4Y6Y143
  • airtable-verification=1f9f5306621f76be14eb5cde11661c2d
  • google-site-verification=neBJBV38v3xXAew00QEe1whxoBx-y0oo0-9840fBTek
  • oci-domain-verification=mwjZ7A40UhcYmctnsvlpDQ4zebV3j9jVCIAqGBSkx
  • sophos-domain-verification=2ec763c10efd73f2c1dbceaad2983ea0093f02a5882445675f0885ffcf6ce608
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