Why in http://www.cfd-online.com/W/index.ph...action=history one says that http://www.giacomo.lorenzoni.name/peei/ is SPAM?

The problem is that your site for some reason has been added to a spam database that CFD-Wiki uses. I suspect that the reason is that it has been listed as a cross-wiki spamming link, that is an external link that has been added to many wikis only as marketing. See here for more information:

http://meta.wikimedia.org/wiki/Talk:...lorenzoni.name

In any case, adding your own site to a wiki is not something that one should do, especially if that is your only contribution to the wiki, and is seems to be in CFD-Wiki (see http://www.cfd-online.com/Wiki/Speci...ibutions/Gi_lo) . A wiki is not a place to advertise your own sites.

Is preferred not to mention my site, instead of the free availability of its contents.