[fetchmail] Error when fetch a mail with a big attach

Hello,
        Im using Debian Linux kernel 2.2.20 with qmail and fetchmail 
5.9.11, and it´s crashed when fetch a mail with a big attach(2 or more 
Mb)... somebody knows about this error??? Its shows me this error:
SIGPIPE thrown from an MDA or stream sock error
socket error while delivering to SMTP host <my_isp_smtp>
Query status=2(SOCKET)
terminated with signal 13


thanx