Domain Overview
DNS: ✓ just now
Checker: ✓ just now
coursedog.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 03:57:35 UTC · ↺ Refresh
MX Hostnames
- alt3.aspmx.l.google.com
- alt4.aspmx.l.google.com
- alt2.aspmx.l.google.com
- alt1.aspmx.l.google.com
- aspmx.l.google.com
MX Priorities
- aspmx.l.google.com: 1
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
A / AAAA Records
- 198.202.211.1
Mail Server IPs
- 172.253.122.26 ↩ bh-in-f26.1e100.net
- 2607:f8b0:4004:c17::1a ↩ bl-in-f26.1e100.net
- 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
- 2a00:1450:4009:c0f::1b ↩ yulhrs-in-f27.1e100.net
- 173.194.76.27 ↩ ws-in-f27.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-x1a.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
SOA Record
Raw SOA
ns-778.awsdns-33.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-778.awsdns-33.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1860.awsdns-40.co.uk
ns-357.awsdns-44.com
ns-778.awsdns-33.net
ns-1278.awsdns-31.org
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:amazonses.com include:_spf.salesforce.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; 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]
DKIM Selectors
✓ 1 found
google._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
12 records- google-site-verification=_AaKh9XrlNWUy3HGrEAwzbP3__62HmiP7JJLYdA7PFQ
- google-site-verification=pY-NXkwKbHWo5_aaxcSvqxmhVPsRYqvWkyVRfLct6ro
- google-site-verification=yEf-qUrl2HTB5ks0l45hHk2b1bNT2f5CmKave3sDvFA
- openai-domain-verification=dv-fh6OxXHwQLNnt2Wkt8lob5MH
- pardot1025673=a1a240f470505b5e8d840f5c431150e2967b4beeb16915150e288b9dbe8a229f
- sending_domain1025673=2ccd38dacbcd2d840ee3e1e8d4e1eb2daac239cbc7d5f80856060c6ff179b6aa
- SPFv=spf1 include:_spf.google.com include:amazonses.com include:_spf.salesforce.com ~all
- zapier-domain-verification-challenge=096d17a8-a2fd-4a56-82db-27831f6eae82
- MS=ms38558668
- MS=ms85999287
- atlassian-domain-verification=GWkQaOa0wpljgSHH9YHyuBYRpvIEjwhaq6UKkHXEuPblZSdWkHFvvznRzNAwotB2
- facebook-domain-verification=tpkzc888gd9mewj34jeixw74bt708t
Full email verification for coursedog.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits