:~$ msmtp ycui07@petrochina.com.cn
adasdfasssssssssssssssssssssssssssssss
msmtp: the server did not accept the mail
msmtp: server message: 451 timeout exceeded (#4.4.2) (eYou MTA)
msmtp: could not send mail (account default from /etc/msmtprc)