Fetchmail cannot access SMTP port (I use Exim)

A few mails above a wrote about a problem with Fetchmail, Exim and Procmail. Now I realize that most likely I have a problem with Fetchmail which, after downloading, says: --- fetchmail: SMTP transaction error while fetching from

Exim - Fetchmail - Procmail

Hi! When I send a message to myself (maurizio) locally exim passes the message correctly to procmail (I have a ~/.procmailrc) which moves it to ~/Mail/In which is read by Mutt. If I send a message to an e-mail address outside my PC world and the I fetch it by fetchmail (~/.fetchmailrc knows