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I found a soloution and what causes it. It was not really the delimiter that was the problem it was becasue a user made duplicate posts. Solution: Replace $notify_message .= preg_replace('#[\s]+#', ' ',sprintf( get_comment_meta($comment->comment_ID, 'title',1))) .' skrev:'. "\r\n" . $comment->comment_content . "\r\n\r\n"; With ...
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