Or if you are trying to use SendMail Method as @zcapkova pointed out the main issue would be that the <MessageBody> element should be escaped. But you have a tag <Body> so it is not clear what form of e-mail method you are using.
Or if you are trying to use SendMail Method as @zcapkova pointed out the main issue would be that the <MessageBody> element should be escaped. But you have a tag <Body> so it is not clear what form of e-mail method you are using.