参考URL

http://waterlow2013.hatenablog.com/entry/2015/03/01/075321
https://developers.google.com/analytics/devguides/collection/protocol/v1/email#document-path
https://developers.google.com/analytics/devguides/collection/protocol/v1/devguide?hl=ja

前提

htmlメールである事

目的

Google Analytics上で開封結果を管理したい

差し込みタグ

//www.google-analytics.com/collect?v=1&tid={{TID}}&cid=555&t=pageview&dh={{hostname}}&dt={{title}}&dp={{page}}" />

パラメーター

Page Tracking

v=1             // Version.
&tid=UA-XXXX-Y  // Tracking ID / Property ID.
&cid=555        // Anonymous Client ID.
&t=pageview     // Pageview hit type.
&dh=mydemo.com  // Document hostname.
&dp=/home       // Page.
&dt=homepage    // Title.

Event Tracking

v=1             // Version.
&tid=UA-XXXX-Y  // Tracking ID / Property ID.
&cid=555        // Anonymous Client ID.
&t=event        // Event hit type
&ec=video       // Event Category. Required.
&ea=play        // Event Action. Required.
&el=holiday     // Event label.
&ev=300         // Event value.