HTML Coding Tips for Email
Coding HTML for email might sound easy, but there are a lot of industry best practices that you might want to know before you begin.
General
- Do not use <div> tags
 - Do not use <p> tags
 - Do not use padding anywhere
 - All content must be tabled
 - Do not use javascripting
 - Do not rely on any content in the <header>
 - Do not use external style sheets, or styling in the header
 - Use spacer images to define blank space, or where possible slice the white space into the images
 - Do not use border attribute – if you need a 1px border is must be created by nesting a centered table inside another table that is 2px wider, that has a background of the border you want. The top and bottom parts of the border must be created using images.
 - Avoid rowspan, and use colspans sparingly.
 
Text
- All text must be wrapped in a <span> that defines the color, font-family, font-size and font-weight (if bold)
 - Do not rely on font styling put into the header, table or td
 - Text alignment must be defined in the td
 - Text should be either arial or verdana
 - Avoid use of lists (either <ul> or <ol>). Instead use bullets, either text or images. Ideally table the bullet and text in separate <td>s
 - Text size should not be less than 11px
 
Images
- Define height and width of all images
 - Image "display" should always be defined (block or inline)
 - Images with text should ALWAYS have alt tags
 - Do not rely on aligned images. Always place the content in a table and align left or right
 - White space should be sliced into the images (rather than relying on spacer images)
 - No image (including spacer images) should have a height or width of less than 5px
 - Do not use image maps
 
Links
 
- All links but mailtos should be targeted to a blank or new page
 - Link color and text-decoration (if not underlined) should be defined in the <a> tag, and again in a <span> tag inside the <a> that wraps the linked text