This domain is part of MailViewed
MailViewed is a read-receipt tool for Gmail. When its users send an email, it can carry a tiny image and short links served from this domain, so the sender can see when their message was opened or a link was clicked. Clicking a link takes you to the page the sender chose; links from emails the sender has since deleted, or older than a year, open mailviewed.com instead.
Nothing else lives here. This domain never sends email, and MailViewed stores no message body or attachments: only the subject, the recipients, the links' destinations, and the time, IP address and browser details of each open or click. The privacy policy says how long that is kept and how to have it deleted.
Received something unwanted?
If an email that used this domain was unsolicited or abusive, tell us at support@mailviewed.com. Forward the email, or include its headers if you can. We look into every report and suspend accounts that misuse the service.