you have blank spaces at the end of lines 1, 2 and 5 which are casing the error.
line 1:
"<?php require_once("webassist/email/mail_php.php"); ?> "
line 2:
"<?php require_once("webassist/email/mailformatting_php.php"); ?> "
line 5:
"?> "
this is the same issue I discuss in the second screen shot of my origianl post:
If you dont see a blank line, it could be a blank space. In the second screen shot, I have enabled Hidden Characters (View -> Code View Options -> Hidden Characters), this shows line breaks and spaces in the code. This shows that line 4 has a closing PHP tag followed by a blank space before the line break. that blank space after the closing PHP Tag:"?> "
