Why doesn't email notification work in Zabbix?

Question

Email

Ubuntu server 14.04. Zabbix 2.4.2.
Set up alerts through an external script.

#!/bin/sh
export smtpemailfrom="[email protected]"
export zabbixemailto="$1"
export zabbixsubject="$2"
export zabbixbody="$3"
export smtpserver=smtp.yandex.ru
export [email protected]
export smtppass=MegaPass
export logfile=/var/log/mail.log
 
/usr/local/bin/sendEmail -l $logfile -f $smtpemailfrom -t $zabbixemailto 
-u $zabbixsubject -m $zabbixbody -s $smtpserver -xu 
$smtplogin -xp $smtppass

The script is where it should be. The rights 755 are given
. If to start through the console, then everything sends and comes. But through zabbix, no way. Shows that "sent", but there are no letters and nothing in the logs either.

Answer 1

Because zabbix already has built-in email alerts and you don't need to fence your bike when the standard option works.

Answer 2

And what did not suit: administration - Notification methods - email?
In general, if something is sent, then the script is called, turn on debugging in it and see where the side is.