The user is able to type their own return name in the From: field in the email dialog, which means they could type anything, valid or invalid, and it will be used as the return value. One way around this is to create a user property in DB2 AlphaBlox to specify the user's email address. Then, remove the From: field from the email dialog and use the email address value from the user property.
Check that the files AASMail.class and ByteArrayDataSource.class exist in the
<application>\WEB-INF\classes\alphablox\ directory.
If not, copy them there from the e-mail example directory. The first time
the class files are copied to the application directory, you may have to restart
the Alphablox server to enable it to find them.
Check that the 'templateFile' variable in emailDialog.html refers to the correct template file, and that this file exists in the same directory.
Check that the 'render' property for the Blox in question is set to 'printer' in the email template file, emailTemplate.jsp. For instance:
<blox:display bloxRef="Present" render="printer" />