Email Domain Lookup

Browse our comprehensive directory of popular email domains with detailed MX records, SPF, DKIM, DMARC authentication data, and mail server information. Research any domain before sending.

2,731 Domains Indexed
SPF, DKIM, DMARC Checks
MX Record Analysis
All (2,731) Freemail (200) Disposable (589) Corporate (1,134) Government (113) Education (431) Isp (264)
Domain ▲ Type Organization Mail Server Status
ohio.edu education Ohio University Microsoft 365 Active View
ohio.gov government State of Ohio Microsoft 365 Active View
oi.com.br isp Oi Telecomunicacoes com.br Active View
oit.edu education Oregon Institute of Technology Microsoft 365 Active View
okstate.edu education Oklahoma State University Microsoft 365 Active View
okta.com corporate Okta Inc. Proofpoint Active View
olddominionfreight.com corporate Old Dominion Freight Line Self-hosted Active View
olin.edu education Olin College of Engineering Microsoft 365 Active View
omnicomgroup.com corporate Omnicom Group Microsoft 365 Active View
omron.com corporate Omron Corporation Microsoft 365 Active View
one-time.email disposable — None Active View
one.lt freemail UAB Cgates Lithuania one.lt Active View
oneoffemail.com disposable — Microsoft 365 Active View
oneok.com corporate ONEOK Proofpoint Active View
onet.pl freemail Ringier Axel Springer Poland onet.pl Active View
onewaymail.com disposable — None Active View
online.nl isp Online.nl capitar.com Active View
ono.com isp ONO None Inactive View
onsemi.com corporate ON Semiconductor Mimecast Active View
oopi.org disposable — oopi.org Active View
ooredoo.com corporate Ooredoo Group ooredoo.qa Active View
op.pl freemail Onet Poczta onet.pl Active View
opendoor.com corporate Opendoor Technologies Proofpoint Active View
opentext.com corporate OpenText Corporation Proofpoint Active View
opm.gov government Office of Personnel Management Microsoft 365 Active View
oppo.com corporate OPPO Electronics Microsoft 365 Active View
optimizely.com corporate Optimizely Inc. Mimecast Active View
optimum.net isp Altice USA openwave.ai Active View
optonline.net isp Altice USA / Optimum openwave.ai Active View
optus.com.au isp Optus fireeyecloud.com Active View
optusnet.com.au freemail Optus Australia atmailcloud.com Active View
oracle.com corporate Oracle Corporation Proofpoint Active View
orange.co.uk isp Orange UK None Active View
orange.fr freemail Orange SA orange.fr Active View
orcon.net.nz isp Orcon net.nz Active View
ordinaryamerican.net disposable — spamgourmet.com Active View
oregon.gov government State of Oregon Microsoft 365 Active View
oregonstate.edu education Oregon State University Microsoft 365 Active View
oreilly.com corporate O'Reilly Automotive Inc. Google Workspace Active View
orsted.com corporate Orsted Microsoft 365 Active View
osaka-u.ac.jp education Osaka University Microsoft 365 Active View
osu.edu education Ohio State University Proofpoint Active View
otenet.gr freemail OTE Greece otenet.gr Active View
otherinbox.com disposable — Mimecast Active View
otis.edu education Otis College of Art and Design Barracuda Active View
ou.edu education University of Oklahoma Proofpoint Active View
ourklips.com disposable — casadorock.com Active View
outlawspam.com disposable — None Active View
outlook.cl freemail Microsoft Corporation Microsoft 365 Active View
outlook.co.id freemail Microsoft Corporation Microsoft 365 Active View

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