msmtp和OVH邮件

我想在用户在Debian 9服务器上进行身份验证时发送邮件。 我使用OVH邮件服务器。 我已经这样设置了msmtp：

account myaccount
tls_starttls off
logfile ~/.msmtp.log

host ssl0.ovh.net
port 465
from user@mydomain.com
auth on
user user@mydomain.com
password XXXXXXXXXXXXXXXX

account default : myaccount

我尝试用：

echo "Hello this is sending email using msmtp" | msmtp otheruser@mydomain.com

发送邮件，但没有成功，什么也没发生。 命令相同：

msmtp --serverinfo --tls --tls-certcheck=off --host ssl0.ovh.net --port 465

EDIT 1

我在评论中尝试了@Anfi提出的命令，但得到了：

-bash: subject:: command not found
ignoring system configuration file /etc/msmtprc: No such file or directory
loaded user configuration file /home/myuser/.msmtprc
falling back to default account
using account default from /home/myuser/.msmtprc
host = ssl0.ovh.net
port = 465
proxy host = (not set)
proxy port = 0
timeout = off
protocol = smtp
domain = localhost
auth = choose
user = user@mydomain.com
password = *
passwordeval = (not set)
ntlmdomain = (not set)
tls = off
tls_starttls = off
tls_trust_file = (not set)
tls_crl_file = (not set)
tls_fingerprint = (not set)
tls_key_file = (not set)
tls_cert_file = (not set)
tls_certcheck = on
tls_min_dh_prime_bits = (not set)
tls_priorities = (not set)
auto_from = off
maildomain = (not set)
from = user@mydomain.com
add_missing_from_header = on
add_missing_date_header = on
remove_bcc_headers = on
dsn_notify = (not set)
dsn_return = (not set)
logfile = /home/myuser/.msmtp.log
syslog = (not set)
aliases = (not set)
reading recipients from the command line
msmtp: the server sent an empty reply 
msmtp: could not send mail (account default from /home/myuser/.msmtprc)