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Email Domains Starting with U - Page 3

Search email domains by risk status

Search and browse email domains classified by RiskMail. Identify temporary/disposable domains and safe email providers.

Jump to All 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
letter U
u-rain.com
Business Domain
Safe
u-reg.com
Business Shared MX
Safe
u-regi.com
No MX
Safe
u-relax.com
Business Domain
Safe
u-rencontre.com
No MX
Safe
u-s-p.ch
Business Shared MX
Safe
u-s4sde65c4y.bat5.com
Business Domain
Safe
u-sex.blogspot.com
No MX
Safe
u-sexe.com
No MX
Safe
u-shopping.com.tw
Business Domain
Safe
u-sluno.eu
Business Shared MX
Safe
u-spalnya.ru
No MX
Safe
u-strasbg.fr
Business Domain
Safe
u-stream.in
No MX
Safe
u-szeged.hu
Business Domain
Safe
u-team.by
Business Domain
Safe
u-team.info
No MX
Safe
u-tec.com
Business Domain
Safe
u-tehnograd.ru
No MX
Safe
u-tools.cn
No MX
Safe
u-topi.com
Business Domain
Safe
u-torrent.cf
No MX
Safe
u-torrent.ga
No MX
Safe
u-torrent.gq
No MX
Safe
u-tune.ru
No MX
Safe
u-tv.ru
Business Domain
Safe
u-v.de
Business Domain
Safe
u-vis.com
Business Domain
Safe
u-voice.net
Business Shared MX
Safe
u-wanna-b-my-slut.tumblr.com
No MX
Safe
u-wholesale.cyou
No MX
Safe
u-wills-uc.pw
Temporary / Disposable
u-word.com
Business Domain
Safe
u-xer.com
Business Shared MX
Safe
u-xp.com
No MX
Safe
u-xxx.com
No MX
Safe
u-zoekt-sexfilms.startspot.nl
No MX
Safe
u-zonta.ru
Business Domain
Safe
u-zoom.tw
Business Shared MX
Safe
u.ae
No MX
Safe
u.biz
No MX
Safe
u.civvic.ro
No MX
Safe
u.coloncleanse.club
Temporary / Disposable
u.com.my
Business Shared MX
Safe
u.dmarc.ro
No MX
Safe
u.fail
No MX
Safe
u.gg
Business Shared MX
Safe
u.hdporncomics.com
No MX
Safe
u.is
Business Domain
Safe
u.labo.ch
No MX
Safe
u.maxvideodownloader.com
No MX
Safe
u.my
No MX
Safe
u.net.my
Business Domain
Safe
u.nus.edu
Business Shared MX
Safe
u.openx.net
No MX
Safe
u.publicvm.com
Temporary / Disposable
u.qvap.ru
No MX
Safe
u.sb
No MX
Safe
u.to
Business Domain
Safe
u.today
Business Shared MX
Safe
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Explore domain risk signals used by the RiskMail API

The RiskMail domain directory is a public reference for email domains we have classified. Every entry is one of two states: Temporary / Disposable (a known throwaway-mail provider) or Safe (a free public email provider, a regular business domain with valid mail infrastructure, or a domain we have not yet seen disposable signals for).

If you operate a signup or login flow, this list is a starting point — disposable providers come and go faster than any static list can track. The RiskMail API reflects the live database in real time and returns a clean verdict: disposable | safe for each request.

See something missing or misclassified? Tell us and we'll re-evaluate the domain.