How to mark up the cross-mailer newsletters in HTML format

HTML newsletters is still very successful type of communication between readers and publishers. Publishers can track the different indicators of such letters, for example, reading the letter, forwarding, clickthroughs, as well as the interest of readers to the different products and topics. Readers absorb information like a regular web page as it is visually more appealing and more easily readable than text messages.

In this article I would like to share knowledges in creating of cross-browser and cross-mailer newsletters. This means – correct displaying of layout in all mail clients. I think that article is still quite relevant. Duty is a long time I was engaged with creating html layouts for newsletters around the world, and the following rules will cover the following mail client and web interfaces: Gmail, Yahoo Mail, Hotmail, MS Outlook, Thunderbird 2.0-3.0, Windows Live Mail, Apple Mail, AOL Mail, possible others.
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