Error while configuring email notifications with mutt and msmtp

[JustinBobby]

zabbix version: 3.0.3

I have installed and configured msmtp and mutt in the zabbix server, and also I have tested that using mutt command could send email successfully.

But when I create a customized media type in zabbix web and specify a script using mutt command to send email , there are always error complaining that messages could not be sent in /tmp/zabbix_server.log.

Error messages like these:
/root/sent: Permission denied (errno = 13)
Could not send the message.

I know this is a mutt related problem, but when i run mutt command locally, there's no problem, but error while triggered from zabbix.

Thanks in advance if anyone could shed some light on this question.

[JustinBobby]

Problem solved.

Update: I have solved this problem. Ultimately it's a mutt related problem which i add an option -F to mutt command and the exceptions disappear.