github.com

Valid Email Server
Domain Lookup › github.com

Domain Overview

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

Checked via [email protected] · 2026-03-18 09:40:50 UTC · ↺ Refresh

MX Hostnames

  • alt4.aspmx.l.google.com
  • aspmx.l.google.com
  • alt1.aspmx.l.google.com
  • alt2.aspmx.l.google.com
  • alt3.aspmx.l.google.com

MX Priorities

  • alt2.aspmx.l.google.com: 5
  • alt3.aspmx.l.google.com: 10
  • alt4.aspmx.l.google.com: 10
  • aspmx.l.google.com: 1
  • alt1.aspmx.l.google.com: 5

A / AAAA Records

  • 140.82.113.4

Mail Server IPs

  • 172.253.116.27 ↩ dj-in-f27.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
  • 192.178.223.27 ↩ yulhrs-in-f27.1e100.net
  • 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
  • 173.194.76.26 ↩ ws-in-f26.1e100.net
  • 2a00:1450:400c:c00::1b ↩ ws-in-x1b.1e100.net
  • 192.178.218.26 ↩ yuiadtq-in-f26.1e100.net
  • 2607:f8b0:4004:c1f::1a ↩ pd-in-f26.1e100.net
  • 108.177.123.26 ↩ lcscld-in-f26.1e100.net
  • 2800:3f0:4003:c0f::1a (no PTR)

SOA Record

Raw SOA ns-1707.awsdns-21.co.uk awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1707.awsdns-21.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

dns2.p08.nsone.net
dns3.p08.nsone.net
dns4.p08.nsone.net
ns-1283.awsdns-32.org
ns-1707.awsdns-21.co.uk
ns-421.awsdns-52.com
ns-520.awsdns-01.net
dns1.p08.nsone.net

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:192.30.252.0/22 include:_netblocks.google.com include:_netblocks2.google.com include:_netblocks3.google.com include:spf.protection.outlook.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com ip4:62.253.227.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ip4:167.89.101.2 ip4:167.89.101.192/28 ip4:192.254.112.60 ip4:192.254.112.98/31 ip4:192.254.113.10 ip4:192.254.113.101 ip4:192.254.114.176 ~all
📊 DNS lookups: 8/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing
v=DMARC1\; p=none\; sp=reject\; pct=100\; rua=mailto:[email protected]\; ruf=mailto:[email protected]\; fo=1
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]\
↳ Subdomain policy: reject\
⚠ Policy applies to 100\% of failing messages only

DKIM Selectors

✓ 4 found
google._domainkey
k1._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

19 records
  • SPFv=spf1 ip4:192.30.252.0/22 include:_netblocks.google.com include:_netblocks2.google.com include:_netblocks3.google.com include:spf.protection.outlook.com include:mail.zendesk.com include:_spf.salesforce.com include:servers.mcsv.net include:mktomail.com ip4:62.253.227.114 ip4:166.78.69.169 ip4:166.78.69.170 ip4:166.78.71.131 ip4:167.89.101.2 ip4:167.89.101.192/28 ip4:192.254.112.60 ip4:192.254.112.98/31 ip4:192.254.113.10 ip4:192.254.113.101 ip4:192.254.114.176 ~all
  • stripe-verification=f88ef17321660a01bab1660454192e014defa29ba7b8de9633c69d6b4912217f
  • MS=ms58704441
  • apple-domain-verification=RyQhdzTl6Z6x8ZP4
  • atlassian-domain-verification=jjgw98AKv2aeoYFxiL/VFaoyPkn3undEssTRuMg6C/3Fp/iqhkV4HVV7WjYlVeF8
  • google-site-verification=UTM-3akMgubp6tQtgEuAkYNYLyYAvpTnnSrDMWoDR3o
  • shopify-verification-code=t1YPwcmvnxZyBycaCpk1MPyWoFs72o
  • calendly-site-verification=at0DQARi7IZvJtXQAWhMqpmIzpvoBNF7aam5VKKxP
  • docusign=087098e3-3d46-47b7-9b4e-8a23028154cd
  • TAILSCALE-xOzoDvFUzZr5YYVCQFuD
  • facebook-domain-verification=39xu4jzl7roi7x0n93ldkxjiaarx50
  • jamf-site-verification=XtaPNIYghF_e_xRDI8CjgQ
  • miro-verification=d2e174fdb00c71e0bcf58f8e58c3da2dd80dcfa9
  • MS=ms44452932
  • MS=6BF03E6AF5CB689E315FB6199603BABF2C88D805
  • adobe-idp-site-verification=b92c9e999aef825edc36e0a3d847d2dbad5b2fc0e05c79ddd7a16139b48ecf4b
  • google-site-verification=82Le34Flgtd15ojYhHlGF_6g72muSjamlMVThBOJpks
  • krisp-domain-verification=ZlyiK7XLhnaoUQb2hpak1PLY7dFkl1WE
  • loom-site-verification=f3787154f1154b7880e720a511ea664d
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