I think that problem is ispconfig's spamassasin, because i configure Postfix with this parameters:
... and the mail is accepted correctly with this rejects. There are both sorbs and spamhaus lists, and the email is accepted without problems. I disabled spamassasin and the emails are acepted, then the problem must be spamassasin. But i dont find where is the problem. I send to other ispconfig server than we own and the emails are accepted correctly. This not happened before upgrade to ispconfig 2.2.13
Thanks in advance, i'm going crazy with this problem.