Пытаюсь отправить почту через sendmail, но письма не доходят. В логах пишет

Jul 22 18:49:14 Debian-60-squeeze-32-minimal sendmail[30632]: p6MGnEaC030632: to=<itdevdevit@yahoo.com>, ctladdr=noreply@allexpert.de (33/33), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31481, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (p6MGnESO030633 Message accepted for delivery) Jul 22 18:49:14 Debian-60-squeeze-32-minimal sm-mta[30635]: p6MGnESO030633: to=<itdevdevit@yahoo.com>, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=121805, relay=l.mx.mail.yahoo.com. [74.6.136.244], dsn=5.6.0, stat=Data format error