Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
masschallenge.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 15:15:55 UTC · ↺ Refresh
MX Hostnames
- masschallenge-org.mail.protection.outlook.com
MX Priorities
- masschallenge-org.mail.protection.outlook.com: 0
A / AAAA Records
- 35.212.40.241 ↩ 241.40.212.35.bc.googleusercontent.com
Mail Server IPs
- 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
- 52.101.9.2 ↩ mail-mn2pr02cu00202.inbound.protection.outlook.com
- 2a01:111:f403:c92c::1 ↩ mail-dm6pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c922:: ↩ mail-bl0pr03cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
bayan.ns.cloudflare.com dns.cloudflare.com 2397513257 10000 2400 604800 1800
Primary NS (mname)
bayan.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397513257
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
demi.ns.cloudflare.com
bayan.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:spf.protection.outlook.com include:1955252.spf05.hubspotemail.net include:helpscoutemail.com include:amazonses.com include:spfa.cpmails.com ~all
📊 DNS lookups: 6/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; fo=1; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
9 records- 1password-site-verification=WBUONHNJNRG2NI5CD6LVGEELVU
- MS=ms42338885
- VgJ7EmvfSXhFhd0T0vY8iBvjMv1vBEoUcZMSi1FhoFM=
- ZOOM_verify_zOFRhWVfTt21ef4mP78VRg
- apple-domain-verification=3088l40S7Cbn0srq
- google-site-verification=NlqQMuRdTYUIQnHDIfUTJYGHVofiU6TXtii3FIRXRhs
- google-site-verification=xSJUBtAtyd4nbT_NHRbhJwB0oXaczdacW4wws2QWM4g
- ppe-cf030490ec93b64a64fbe60d6b40afcb34dd858b
- SPFv=spf1 include:_spf.google.com include:spf.protection.outlook.com include:1955252.spf05.hubspotemail.net include:helpscoutemail.com include:amazonses.com include:spfa.cpmails.com ~all
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 masschallenge.org
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits