订阅Linux kernel main list，根据说明发送邮件到majordomo@vger.kernel.org
但是一直提示失败，失败信息为：
--
>>>> --_000_TYBP286MB0285B20DED8FB6CE5166B887BA609TYBP286MB0285JPNP_
**** Command '--_000_tybp286mb0285b20ded8fb6ce5166b887ba609tybp286mb0285jpnp_' not recognized.
>>>> Content-Type: text/plain; charset="gb2312"
**** Command 'content-type:' not recognized.
>>>> Content-Transfer-Encoding: base64
**** Command 'content-transfer-encoding:' not recognized.
>>>>
>>>> c3Vic2NyaWJlIGxpbnV4LWtlcm5lbA0K
**** Command 'c3vic2nyawjligxpbnv4lwtlcm5lba0k' not recognized.
>>>>
>>>> --_000_TYBP286MB0285B20DED8FB6CE5166B887BA609TYBP286MB0285JPNP_
**** Command '--_000_tybp286mb0285b20ded8fb6ce5166b887ba609tybp286mb0285jpnp_' not recognized.
>>>> Content-Type: text/html; charset="gb2312"
**** Command 'content-type:' not recognized.
>>>> Content-Transfer-Encoding: quoted-printable
**** Command 'content-transfer-encoding:' not recognized.
>>>>
>>>>
**** Command '' not recognized.
>>>>
**** Command '
' not recognized.
>>>>
>>>> charset=3Dgb2312">
**** Command '
>>>>