What you get for every domain
Select any domain below to see its full deliverability profile and verify individual email addresses at that domain for free.
- Live mailbox verification confirms whether a specific address exists and accepts mail, with no email ever sent.
- MX records and mail server health show you which servers handle mail for the domain, their priority, and whether they respond.
- SPF, DKIM and DMARC authentication tell you whether the domain protects against spoofing and how receivers will treat your mail.
- Deliverability scoring and reputation give you a clear verdict: safe to send, proceed with caution, or do not send.
- WHOIS registration and domain history reveal who operates the domain, when it was registered, and its nameservers.
Cleaning a full list?
Upload a CSV or TXT file with any number of addresses across any mix of domains. Every address runs through the same live SMTP checks you see on the individual domain pages, plus catch-all detection, role-account filtering, and disposable domain blocking.
From $0.0001 per emailPay as you go. No subscription. Credits never expire.
Previously failed? Free recheckAddresses on your blacklist are reprocessed at no cost.
Popular Domains
gmail.com Google LLC
yahoo.com Yahoo Inc.
outlook.com Microsoft Corporation
hotmail.com Microsoft Corporation
live.com Microsoft Corporation
icloud.com Apple Inc.
aol.com AOL Inc.
protonmail.com Proton AG
comcast.net Comcast Corporation
verizon.net Verizon Communications
att.net AT&T Inc.
msn.com Microsoft Corporation
All (2,731)
Freemail (200)
Disposable (589)
Corporate (1,134)
Government (113)
Education (431)
Isp (264)
| Domain ▼ | Type | Organization | Mail Server | Status | |
|---|---|---|---|---|---|
| uwaterloo.ca | education | University of Waterloo | iphmx.com | Active | View |
| uw.edu | education | University of Washington | Proofpoint | Active | View |
| uvm.edu | education | University of Vermont | uvm.edu | Active | View |
| utsa.edu | education | University of Texas at San Antonio | Microsoft 365 | Active | View |
| uts.edu.au | education | University of Technology Sydney | Mimecast | Active | View |
| utoronto.ca | education | University of Toronto | Microsoft 365 | Active | View |
| utk.edu | education | University of Tennessee Knoxville | Microsoft 365 | Active | View |
| utexas.edu | education | University of Texas at Austin | utexas.edu | Active | View |
| utep.edu | education | University of Texas at El Paso | Microsoft 365 | Active | View |
| utah.gov | government | State of Utah | Google Workspace | Active | View |
| utah.edu | education | University of Utah | iphmx.com | Active | View |
| usyd.edu.au | education | University of Sydney | Mimecast | Active | View |
| usu.edu | education | Utah State University | Microsoft 365 | Active | View |
| usps.com | government | United States Postal Service | Proofpoint | Active | View |
| usp.br | education | University of Sao Paulo | Google Workspace | Active | View |
| usi.edu | education | University of Southern Indiana | Microsoft 365 | Active | View |
| usf.edu | education | University of South Florida | Microsoft 365 | Active | View |
| usda.gov | government | U.S. Department of Agriculture | Microsoft 365 | Active | View |
| usd.edu | education | University of South Dakota | Microsoft 365 | Active | View |
| usc.edu | education | University of Southern California | Proofpoint | Active | View |
| usaid.gov | government | U.S. Agency for International Development | Google Workspace | Active | View |
| usaa.com | corporate | USAA | Proofpoint | Active | View |
| usa.gov | government | U.S. Government | None | Active | View |
| usa.com | freemail | USA.com Inc. | mail.com | Active | View |
| uri.edu | education | University of Rhode Island | Proofpoint | Active | View |
| uq.edu.au | education | University of Queensland | iphmx.com | Active | View |
| ups.com | corporate | United Parcel Service | Proofpoint | Active | View |
| upmc.com | corporate | UPMC | Proofpoint | Active | View |
| upenn.edu | education | University of Pennsylvania | Proofpoint | Active | View |
| upc.nl | isp | UPC Netherlands | ziggo.com | Active | View |
| up.edu | education | University of Portland | Microsoft 365 | Active | View |
| uottawa.ca | education | University of Ottawa | Microsoft 365 | Active | View |
| uol.com.br | freemail | UOL Group | com.br | Active | View |
| unum.com | corporate | Unum Group | Proofpoint | Active | View |
| unt.edu | education | University of North Texas | Microsoft 365 | Active | View |
| unsw.edu.au | education | UNSW Sydney | Proofpoint | Active | View |
| uno.edu | education | University of Nebraska at Omaha | Microsoft 365 | Active | View |
| unm.edu | education | University of New Mexico | Microsoft 365 | Active | View |
| unlv.edu | education | University of Nevada, Las Vegas | Google Workspace | Active | View |
| unl.edu | education | University of Nebraska-Lincoln | Proofpoint | Active | View |
| unk.edu | education | University of Nebraska at Kearney | Proofpoint | Active | View |
| universalmusic.com | corporate | Universal Music Group | Microsoft 365 | Active | View |
| unitymedia.de | isp | Unitymedia | unitymedia.de | Active | View |
| unity.com | corporate | Unity Technologies | Google Workspace | Active | View |
| unitedway.org | corporate | United Way Worldwide | Barracuda | Active | View |
| unitedhealth.com | corporate | UnitedHealth Group | corpmailsvcs.com | Active | View |
| united.com | corporate | United Airlines | Proofpoint | Active | View |
| uniqlo.com | corporate | Fast Retailing - UNIQLO | Microsoft 365 | Active | View |
| unionpacific.com | corporate | Union Pacific Railroad | None | Active | View |
| unimelb.edu.au | education | University of Melbourne | Mimecast | Active | View |
Verify Your Entire Email List
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