Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
duolingo.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-26 23:21:34 UTC · ↺ Refresh
MX Hostnames
- aspmx3.googlemail.com
- aspmx5.googlemail.com
- alt2.aspmx.l.google.com
- aspmx4.googlemail.com
- alt1.aspmx.l.google.com
- aspmx.l.google.com
- aspmx2.googlemail.com
MX Priorities
- aspmx5.googlemail.com: 30
- aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 20
- alt2.aspmx.l.google.com: 20
- aspmx2.googlemail.com: 30
- aspmx3.googlemail.com: 30
- aspmx4.googlemail.com: 30
A / AAAA Records
- 54.243.145.14
- 35.172.172.202
- 23.22.119.55
Mail Server IPs
- 173.194.76.26 ↩ ws-in-f26.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-x1a.1e100.net
- 142.251.167.26 ↩ ww-in-f26.1e100.net
- 2607:f8b0:4004:c21::1a ↩ pe-in-f26.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.26 ↩ dj-in-f26.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
SOA Record
Raw SOA
ns-1020.awsdns-63.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1020.awsdns-63.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-247.awsdns-30.com
ns-1020.awsdns-63.net
ns-1117.awsdns-11.org
ns-1904.awsdns-46.co.uk
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:100.25.59.11 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:52.73.203.75 ip4:52.70.130.33 include:amazonses.com include:_spf.google.com include:_spf.salesforce.com include:mail.zendesk.com include:aspmx.pardot.com ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; fo=1; rua=mailto:[email protected],mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; adkim=r; aspf=r
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 4 found
google._domainkey
k1._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
22 records- atlassian-sending-domain-verification=423a5faf-1cfa-4704-a38a-f7adae302dd6
- MS=ms66530579
- pardot_208162_*=610bfb45f202232a79db94c298b30d14332a62a6894e695b025fa7949d7b03fa
- rippling-domain-verification=9692f0635321f04d
- aliyun-site-verification=1acfc148-50be-45c8-a021-3c933fc8eff9
- slack-domain-verification=iuNWYimCCkEpnistAJvWc4YOZF8izoZ23TCDek0I
- docker-verification=b4ead4c5-fd66-42a5-a684-8f2e7f4c1417
- openai-domain-verification=dv-ieCpefZUqvVQwb8f7o4SlFye
- spacelift-domain-verification=519xtPXm
- amazonses:+SIz2NZPqYri3C+PSIyKShZIbuI4rNpbLlES7lmvpu4=
- pardot_208162_*=c15d5cb1b9f31e26058e1f30bda9e5d65c57cfeea37b34af8e1dd88474460e90
- SPFv=spf1 ip4:100.25.59.11 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:52.73.203.75 ip4:52.70.130.33 include:amazonses.com include:_spf.google.com include:_spf.salesforce.com include:mail.zendesk.com include:aspmx.pardot.com ~all
- h1-domain-verification=sjPBeaGqQwEe8YhJ3W8JVNJa7WDQFAzc6AHkURoErkh324Yy
- _vg2bua41v8x489g1y55hg3hr4h3qmj0
- apple-domain-verification=bMPI889zOgALUenN
- klaviyo-site-verification=RKdcF3
- anthropic-domain-verification-z4335b=YssTBALPY7K784Sri4FjVHjd3
- e622flctk14s3cs3ccdauh8uth
- klaviyo-site-verification=TGmZS7
- google-site-verification=975UaH3lkKONB88HjWDDg34p8cdCqyTVSq_KGBAXrmU
- openai-domain-verification=dv-A4cFxdrYIEodfG6UiQU0qxnT
- jetbrains-domain-verification=bt8q7duih10l9pmf5fo5yy8wf
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