Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
extremenetworks.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 10:46:24 UTC · ↺ Refresh
MX Hostnames
- extremenetworks-com.mail.protection.outlook.com
MX Priorities
- extremenetworks-com.mail.protection.outlook.com: 10
A / AAAA Records
- 20.163.232.59 (no PTR)
Mail Server IPs
- 52.101.9.26 ↩ mail-bl0pr02cu00702.inbound.protection.outlook.com
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 40.93.192.1 ↩ mail-dm5pr02cu00201.inbound.protection.outlook.com
- 52.101.11.13 ↩ mail-sn1pr0501cu00205.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-05.azure-dns.com hostmaster.extremenetworks.com 2023052301 3600 600 604800 60
Primary NS (mname)
ns1-05.azure-dns.com
Admin Email (rname)
hostmaster@extremenetworks.com
Serial
2023052301
Refresh
3600s
Retry
600s
Expire
604800s
Minimum TTL
60s
Nameservers (NS)
ns1-05.azure-dns.com
ns2-05.azure-dns.net
ns3-05.azure-dns.org
ns4-05.azure-dns.info
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:160.34.15.16/29 ip4:52.255.208.228 ip4:50.31.39.135 ip4:50.31.36.25 ip4:138.1.36.217 ip4:147.154.18.119 include:_spf.extremenetworks.com include:spf.protection.outlook.com include:_spf.salesforce.com include:amazonses.com include:mktomail.com include:spfa.cpmails.com ~all
📊 DNS lookups: 6/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected]; fo=1
✓ Reject — strongest protection
📋 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
15 records- _d8gs7afka3qev58ms5krr6bmqav2rah
- SPFv=spf1 ip4:160.34.15.16/29 ip4:52.255.208.228 ip4:50.31.39.135 ip4:50.31.36.25 ip4:138.1.36.217 ip4:147.154.18.119 include:_spf.extremenetworks.com include:spf.protection.outlook.com include:_spf.salesforce.com include:amazonses.com include:mktomail.com include:spfa.cpmails.com ~all
- 766a441a-c93a-44fc-ae0b-0ee0ca3c884e
- bb0d6a51-ad36-4271-a1c3-5128fe4acb21
- atlassian-domain-verification=Lo70GKyp/HxUb52RgFWfWY5UzDyJ0hXkwz8EQeVmO11zxjphzuMJ6q7vF0upia7g
- google-site-verification=np6zBlYrRweWNlvyJ4beuC0qUp2iZZ_VwdNr1jOPdV4
- adobe-idp-site-verification=36e68319e6f8d98f836b60d84edb4a465929fe82d78452fa26b0b6e48b2eba11
- _9hq72z8rwa8wc7jetmp0vom4gacd7iy
- wnz861x1ll9c8t3v00v281653qmgr2mx
- miro-verification=1a830ebb680ca596166c617c6583cf677749b6ca
- reachdesk-verification=t7eYN1LqiTNJJW78LpObfmEyAxFZPaVAoJteS9eAcyCbaMmHK6Vf3xtDfa8nPh2W
- pendo-domain-verification=abe912da-338d-4952-82d6-5628e26cfb1d
- jamf-site-verification=HMg4g7Mx3levIYVtTVZwSA
- atlassian-domain-verification=uom8gNdRYlx2exFwbN0oelZUK5cMPdAe523dfzN4fZ2WamHWTvE8i6YXf8ElGaBw
- 01664d31d3ea491b83a91b997df7987e
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 extremenetworks.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits