Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
csd99.org
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 21:29:09 UTC · ↺ Refresh
MX Hostnames
- alt3.aspmx.l.google.com
- alt2.aspmx.l.google.com
- aspmx.l.google.com
- alt4.aspmx.l.google.com
- alt1.aspmx.l.google.com
MX Priorities
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
A / AAAA Records
- 104.17.71.73
Mail Server IPs
- 108.177.123.26 ↩ lcscld-in-f26.1e100.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
- 192.178.218.26 ↩ yuiadtq-in-f26.1e100.net
- 2607:f8b0:4004:c08::1a ↩ bi-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-f26.1e100.net
SOA Record
Raw SOA
kay.ns.cloudflare.com dns.cloudflare.com 2398002208 10000 2400 604800 1800
Primary NS (mname)
kay.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398002208
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
walt.ns.cloudflare.com
kay.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:216.83.185.44 ip4:74.205.225.52 ip4:192.254.121.248 ip4:76.12.61.252 ip4:23.21.109.197 ip4:23.21.109.212 ip4:64.8.188.97 ip4:209.29.33.9 include:_spf.google.com include:mg.infinitecampus.org include:mailgun.org ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 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
8 records- google-site-verification=_nFbgAvJowNTjBhoeJiGdu-VkXoefZPH5ozTk5O6s04
- google-site-verification=oT_LX6KjtFy1w277RnYEQPxaqc-l6RcgaapJB_Ld8qw
- SPFv=spf1 ip4:216.83.185.44 ip4:74.205.225.52 ip4:192.254.121.248 ip4:76.12.61.252 ip4:23.21.109.197 ip4:23.21.109.212 ip4:64.8.188.97 ip4:209.29.33.9 include:_spf.google.com include:mg.infinitecampus.org include:mailgun.org ~all
- MS=ms63363875
- QmE+dxZ8qoY7QeB1lU58BTHHUMpOAHZeol1WaTwgrIkJrLMA/9T5iw3UGF9SQZXUbpfMYGSa7OywzFcC0yaFwA==
- adobe-idp-site-verification=ef07a36cd840d6b09c5fc9cd3fca6e7d5778b8ce844792806bbea569590205a8
- apple-domain-verification=mzK1hg4RknsNmj2A
- campussuite-domain-verification=e4b78c5ad81cb648edeb970f410d26e6
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for csd99.org
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits