Emails use HTML layouts from circa 2003. They use nested tables in the HTML to align content. An entire email consists of layers of tables inside of each other with specific rows and cells that can each have properties altering the content inside each of them.
That means that hierarchically emails look like below:
As you can see, each box is its own table that is nested or placed entirely inside another table. Each table and HTML element can have its own properties that are then inherited by the other tables nested inside of them, unless they have their own properties that supersede them.
In the example above, the centered text table has the <table align=”center”> property which centers the table inside the other table(s) that it is in.
HTML In Fireside
Fireside embeds the Telerik wysiwyg (What You See Is What You Get) editor inside the product to generate HTML from a GUI (Graphical User Interface - basically buttons and menus instead of just text).
What this means is that users change something in the menu, and that has a corresponding effect on the HTML. The changes that it makes are not always intuitive. A good rule of thumb is to work backward from the change you want to make in the HTML text, and seeing which changes in the editor will give you the desired effect.
When you copy and paste anything into the Telerik editor, it also copies and pastes any styling that the text has. As such, be sure to paste plain text into the editor, by hitting Ctrl + Shift + v or make use of the Paste Plain Text button in the editor toolbar (located just to the left of the undo button). The Paste Plain Text button functions the same as Notepad in that it strips out unwanted source code.