here is the log
... postfix/smtpd[x]: NOQUEUE: reject: MAIL from unknown[y.y.y.y]: 452 4.3.1 Insufficient system storage; proto=ESMTP helo=<domain.com>
... postfix/smtpd[x]: warning: not enough free space in mail queue: 123852800 bytes < 1.5*message size limit
but this was the limit i put on years ago because some users complains that the messages with big attachments did not pass the server, so i increase it, but recently i have to redo the server because of a failure of the HDD some other thing that i notice it were that the root partition of the server where 99% and not very much mails in the queue.
anyway i have to say that the postfix that were used were old compared to this one and the version of openbsd were different too, so i come back to the default configuration to
and bang the problems go away, but this let me with one question, why my root partion where in 99% ?? i found the answer and this is something to have in account, i will post it in other entry