Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
supplier.io
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 06:34:13 UTC · ↺ Refresh
MX Hostnames
- supplier-io.mail.protection.outlook.com
MX Priorities
- supplier-io.mail.protection.outlook.com: 0
A / AAAA Records
- 141.193.213.20 (no PTR)
- 141.193.213.21 (no PTR)
Mail Server IPs
- 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
- 52.101.10.8 ↩ mail-bn1pr04cu00100.inbound.protection.outlook.com
- 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
- 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
- 2a01:111:f403:c801::1 ↩ mail-sn1pr0501cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c91d::a ↩ mail-co1pr21cu00202.inbound.protection.outlook.com
- 2a01:111:f403:f90c:: ↩ mail-sn1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
greg.ns.cloudflare.com dns.cloudflare.com 2398697492 10000 2400 604800 1800
Primary NS (mname)
greg.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398697492
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
zoe.ns.cloudflare.com
greg.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:167.89.68.67 ip4:35.238.14.204 ip4:103.211.37.203 ip4:183.82.100.7 include:mail.zendesk.com include:sendgrid.net include:spf.mandrillapp.com include:spf.protection.outlook.com include:371945.spf04.hubspotemail.net include:_spf.psm.knowbe4.com -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; 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
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
20 records- openai-domain-verification=dv-XLcV6YwZWgv4hsxuf2OZ8Gat
- asv=ebd4ae6a57c8acc9d6ea83ae392a4503
- pendo-domain-verification=5U7lYWB_jzyyVQ8rju23-A4d7lA
- google-site-verification=zyy7i1oLme8R1ZBb-h1UBt5KYE4CwZuoL10BD9XAOVY
- _globalsign-domain-verification=cSUYbKGVnbr18mT_DxljQ3lSz1ac7IO133wniA7gtV
- launchdarkly-domain-verification=c2da3445-ed05-476d-b55c-7888fc3d44c5
- stripe-verification=02a81b97c3ab1923c714f1e6d34c400b75065467d54b7eb47ab3ab5aeec55dd1
- MS=8DA9B19B2C54CC053D9568FA8E5E4C6624791559
- segment-site-verification=YMLv0hZXmNMfr8tNK5thm5UnTtZtcty4
- _globalsign-domain-verification=xt0xeAXCHO-c79UuPgmybBTpWTudXpXi2DDzqRdnsE
- google-site-verification=dRVlNKpG45OzK5xQn3IkEuX2Y4ePA_z2lFgLELJRlJE
- apple-domain-verification=1wXonFpZKLKJAV9p
- SPFv=spf1 ip4:167.89.68.67 ip4:35.238.14.204 ip4:103.211.37.203 ip4:183.82.100.7 include:mail.zendesk.com include:sendgrid.net include:spf.mandrillapp.com include:spf.protection.outlook.com include:371945.spf04.hubspotemail.net include:_spf.psm.knowbe4.com -all
- anthropic-domain-verification-e7wj1p=S1ZPPWaiwZ1jiZRllNipltWKJ
- atlassian-domain-verification=PvIy2Jg3omDKR5dwpNvsj/QL/PHghBQzqFtDqJ0Xq5/Ak6dalab9sgasfqbQsOCz
- google-site-verification=-WsjMEAnZH2zd4NgZhnEgWBHdey31Cbz2HsMksd8HvE
- ZOOM_verify_s4SSAxW4TMiDx7UH0Km8dQ
- google-site-verification=piF9hpI1HGQN7Yo8NDKZAAUgCk487IpfhdsNRpu8CSg
- facebook-domain-verification=rh1akkr7nwpki93rbtss30wvk59py5
- rippling-domain-verification=4cc5c082a20c48dc
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 supplier.io
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits