Modify Width of HTML Email Templates With Salesforce Data Loader

Use Data Loader to change the width of HTML Email Templates

1. Log in to Data Loader.
2. Click 'Export All'.
3. Check 'Show All Salesforce Objects' and select the Email Template object, choose your export destination, then click Next.
4. Click Select All Fields, then click the Finish button.
5. Open your export file in the CSV tool of your choice (example: Excel, Google Sheets, etc).

There is a field (column) called 'TEMPLATE TYPE.' This column will show you which of your email templates are HTML.

6. Once you've identified the HTML templates, the field that we want to modify is the column called 'HTML VALUE.'
7. In that field you’ll see values that define the email as in the example below. You can modify the 'width attribute in the HTML to make your template wider.
 

Example :

<table height="400″ width="550" cellpadding="5″ border="0″ cellspacing="5″ >

<tr height="400″ valign="top" >

<td style=" color:#000000; font-size:12pt; background-color:#FFFFFF; font-family:arial; bLabel:main; bEditID:r3st1;" tEditID="c1r1″ locked="0″ aEditID="c1r1″ >

8. Once you modify that HTML tag, you can use the Data Loader to update the template with the new width value using the same CSV file with the updated value.