Email Client Monitor is able to track different ways your subscribers engage with your email. One way is through email platform identification. We track email platforms based on Desktop, Webmail, Mobile, Web Proxy, and Other.

Desktop

Opens are categorized as Desktop when a subscriber views your email through software installed on their computer. If our pixel returns a user-agent string for a known desktop email client, such as Outlook, we will mark it as Desktop.

Webmail

Opens are categorized as Webmail when a subscriber uses their email account (i.e., Microsoft) in an internet browser.

Important: If a subscriber uses an internet browser on a mobile device to view your email, it is categorized as Mobile instead of Webmail.

Mobile

Opens are categorized as Mobile when a subscriber uses a mobile application or internet browser via a smartphone or tablet to view your email.

Mobile opens are based on the operating system (OS) captured when subscribers open your email. This means if a subscriber uses an internet browser on their mobile device, the open is categorized as Mobile instead of Webmail.

Web Proxy

Opens are categorized as Web Proxy when a subscriber views your email in a Google or Yahoo (AOL or Verizon) account. Web Proxy is technically different from the other categories because the mailbox provider downloads the images, caches them internally, and serves those cached images to the subscriber.

Occasionally a browser may bypass the caching behavior. If this happens, you may see a Google or Yahoo open show up under Webmail instead of Web Proxy.

Other

The Other category includes all views by subscribers that could not be classified as Desktop, Webmail, Mobile, or Web Proxy.

Other opens usually include views of the pixel through clients such as:

• Java libraries
• Really Simple Syndication (RSS) readers
• Automated crawlers
• Users who are not returning a valid user agent string