Are you sure Axel has been publicly humiliated, though? Are you suggesting that just reading his email (unedited) would make people agree with Peter's opinion that the email is laughable, or (implied) that Axel is not a technocrat?
The Register normally publish "flames of the week" unedited and with no further editorial comment, and also include a very visible "Opinion" tag on the front page for articles that are opinion rather than news as such. Either approach could be worth considering for Drobe.
A number of people have raised the topic of "professionalism", but it's quite clear that those behind Drobe are not running it in order to earn a living. Some of those I've mentioned, who do run similar sites in order to earn a living, do produce very similar articles to this.
Finally, I should point out that the law would regard Axel's email as being "published" as soon as he sent it to Drobe. Libel may be a lovely term for armchair lawyers, but there's nothing in the article in question that even vaguely approaches it (since we can safely assume that Axel did indeed send the email as quoted).