I am working on creating a dynamic template with a very simple table and some text in Sendgrid. This email will be sent out to internal employees viewing almost entirely on desktops in Outlook, so I'm not too worried about consistency or compatibility. In all my test emails, the body was centered instead of all the way to the left. I viewed the source and played around with it until I finally realized there was a table above my content that had a styling of max-width:600px; which was causing it to be smaller and centered. Once I removed that styling it pushed my body all the way to the left like I wanted.
So what I am wanting to figure out is how to remove all that garbage HTML and CSS that Sendgrid adds to the source. Or at least remove that max-width of 600px.
Here is some of the example code that gets automatically added to all the emails that get sent out:
<body>
<center class="wrapper" data-link-color="#1188E6" data-body-style="font-size:14px; font-family:arial,helvetica,sans-serif; color:#000000; background-color:#FFFFFF;">
<div class="webkit">
<table cellpadding="0" cellspacing="0" border="0" width="100%" class="wrapper" bgcolor="#FFFFFF">
<tr>
<td valign="top" bgcolor="#FFFFFF" width="100%">
<table width="100%" role="content-container" class="outer" align="center" cellpadding="0" cellspacing="0" border="0">
<tr>
<td width="100%">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td>
<!--[if mso]>
<center>
<table><tr><td width="600">
<![endif]-->
<table width="100%" cellpadding="0" cellspacing="0" border="0" style="width:100%; max-width:600px;" align="center">
I really don't understand why the email needs to have at least 4 nested tables! That last table tag is where the max-width is located.
No other settings that I am aware of. Here is a screenshot of my code in the editor:

Adding a visual representation as to what is going on to better help.

The body of the email is centered and I just want it left justified.
<h1>directly in the<body>and it was delivered like that. Are there any other settings you've added for this? Can you show a screenshot of how you are editing this template?