By default, Visualforce email templates always use the standard look and feel of other Salesforce components. However, you can extend or overwrite these styles by defining your own stylesheet.
Unlike other Visualforce pages, Visualforce email templates cannot use referenced page styles or static resources. Although the CSS appears to render in the email template preview pane, it does not appear the same to the recipients of your email. You must define your style using CSS within <style> tags.
<messaging:emailTemplate recipientType="Contact" relatedToType="Account" subject="Case report for Account: {!relatedTo.name}" replyTo="support@acme.com"> <messaging:htmlEmailBody> <html> <style type="text/css"> body {font-family: Courier; size: 12pt;} table { border-width: 5px; border-spacing: 5px; border-style: dashed; border-color: #FF0000; background-color: #FFFFFF; } td { border-width: 1px; padding: 4px; border-style: solid; border-color: #000000; background-color: #FFEECC; } th { color: #000000; border-width: 1px ; padding: 4px ; border-style: solid ; border-color: #000000; background-color: #FFFFF0; } </style> <body> <p>Dear {!recipient.name},</p> <table border="0" > <tr> <th>Case Number</th><th>Origin</th> <th>Creator Email</th><th>Status</th> </tr> <apex:repeat var="cx" value="{!relatedTo.Cases}"> <tr> <td><a href = "https://na1.salesforce.com/{!cx.id}">{!cx.CaseNumber} </a></td> <td>{!cx.Origin}</td> <td>{!cx.Contact.email}</td> <td>{!cx.Status}</td> </tr> </apex:repeat> </table> </body> </html> </messaging:htmlEmailBody> </messaging:emailTemplate>
<apex:component access="global"> <style type="text/css"> body {font-family: Courier; size: 12pt;} table { border-width: 5px; border-spacing: 5px; border-style: dashed; border-color: #FF0000; background-color: #FFFFFF; } td { border-width: 1px; padding: 4px; border-style: solid; border-color: #000000; background-color: #FFEECC; } th { color: #000000; border-width: 1px ; padding: 4px ; border-style: solid ; border-color: #000000; background-color: #FFFFF0; } </style> </apex:component>
<messaging:htmlEmailBody> <html> <c:EmailStyle /> <body> <p>Dear {!recipient.name},</p> ... </body> </html> </messaging:htmlEmailBody>