файл отрицательного размера

marck@woozle:~> openssl s_client -connect smtp.yandex.ru:25 -starttls smtp
CONNECTED(00000003)
depth=0 /C=RU/2.5.4.17=111033/ST=Russian Federation/L=Moscow/2.5.4.9=MOSCOW/2.5.4.9=Samokatnaya 1 bldg 21/O=OOO Yandex/OU=NOC/OU=EliteSSL/CN=smtp.yandex.ru
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 /C=RU/2.5.4.17=111033/ST=Russian Federation/L=Moscow/2.5.4.9=MOSCOW/2.5.4.9=Samokatnaya 1 bldg 21/O=OOO Yandex/OU=NOC/OU=EliteSSL/CN=smtp.yandex.ru
verify error:num=27:certificate not trusted
verify return:1
depth=0 /C=RU/2.5.4.17=111033/ST=Russian Federation/L=Moscow/2.5.4.9=MOSCOW/2.5.4.9=Samokatnaya 1 bldg 21/O=OOO Yandex/OU=NOC/OU=EliteSSL/CN=smtp.yandex.ru
verify error:num=21:unable to verify the first certificate
verify return:1
---
Certificate chain
 0 s:/C=RU/2.5.4.17=111033/ST=Russian Federation/L=Moscow/2.5.4.9=MOSCOW/2.5.4.9=Samokatnaya 1 bldg 21/O=OOO Yandex/OU=NOC/OU=EliteSSL/CN=smtp.yandex.ru
   i:/C=GB/O=Comodo Limited/OU=Comodo Trust Network/OU=Terms and Conditions of use: http://www.comodo.net/repository/OU=(c)2002 Comodo Limited/CN=Comodo Class 3 Security Services CA