Does someone knows another "fix" for this? I am looking for a simple way. And how is this in sharepoint 2010?
from http://rrfreeman.blogspot.com.br/2010/12/emailed-relative-html-rich-text-column.html
Scenario
You have a list with a multi line text column with Enhanced Rich Text. The item contains links from the current server. You are emailing the contents of that column via SharePoint Designer 2007 Workflows
Issue
The hyperlinks in the email do not work. The server name was automatically stripped from the URL, making a relative path.
Resolution
Workaround: Add the following note to the field description notifying users of the problem and the workaround. "Use http://TinyUrl.com for hyperlinks and images on this site. This will prevent emailed relative links." This works because SharePoint only strips URLs it recognizes as local URLs These are usually defined in the Alternate Access Mappings You can use any URL redirector
Fixes: Use Visual Studio Workflows and replace the Relative URLs with Absolute URLs Intercept the outbound emails (on the SharePoint or Email servers) and replace Use a custom Workflow Action that prepends the servername into the URLs Use a different field type. Try different custom Rich Text editor columns.