usm.com

Valid Email Server
Domain Lookup › usm.com

Domain Overview

DNS: ✓ 23d ago Checker: ✓ 23d ago
usm.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-07-10 12:00:10 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • usm-com.mail.protection.outlook.com

MX Priorities

  • usm-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.26.4.181 (no PTR)
  • 104.26.5.181 (no PTR)
  • 172.67.68.43 (no PTR)
  • 2606:4700:20::681a:4b5 (no PTR)
  • 2606:4700:20::ac43:442b (no PTR)
  • 2606:4700:20::681a:5b5 (no PTR)

Mail Server IPs

  • 52.101.185.12 ↩ mail-zrap278cu00304.inbound.protection.outlook.com
  • 52.101.185.14 ↩ mail-zr1p278cu00206.inbound.protection.outlook.com
  • 52.101.187.1 ↩ mail-gvap278cu00301.inbound.protection.outlook.com
  • 52.101.185.13 ↩ mail-zrzp278cu00205.inbound.protection.outlook.com

SOA Record

Raw SOA jason.ns.cloudflare.com dns.cloudflare.com 2408765159 10000 2400 604800 1800
Primary NS (mname)
jason.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2408765159
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

vita.ns.cloudflare.com
jason.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:178.15.146.75 ip4:194.50.45.52 ip4:217.150.252.13/32 ip4:188.94.250.251 ip4:194.50.45.44 ip4:113.34.91.74 ip4:16.62.237.33 include:shops.shopify.com include:spf.protection.outlook.com include:spf.cloud.ci-solution.com include:_spf.salesforce.com include:relay.mailchannels.net -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict 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

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

7 records
  • MS=ms28166514
  • facebook-domain-verification=nwf1p147ltwano67u8m1rh7bx8hmxv
  • google-site-verification=8Iyt4EHKR81tMgxWPi62pwZUfPvwfIg_w4pGoYC_mvc
  • kbt4k364og5tardhvv9dc0uc2t
  • miro-verification=e0cdf95c881b3ca83a21b1cfb4c51f68265bccc7
  • rm_verify=46c24928fe
  • SPFv=spf1 ip4:178.15.146.75 ip4:194.50.45.52 ip4:217.150.252.13/32 ip4:188.94.250.251 ip4:194.50.45.44 ip4:113.34.91.74 ip4:16.62.237.33 include:shops.shopify.com include:spf.protection.outlook.com include:spf.cloud.ci-solution.com include:_spf.salesforce.com include:relay.mailchannels.net -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 · Customize →
See demo & docs
Deep verification
Full email verification for usm.com

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits