Странности с zabbix agent

[Anarhyst]

Есть парк серверов(одни на дебиане, другие на центоси...

[0xy]

Hello,
I have some problem with sending notifications, after some time zabbix stop sending messages, after restart it works again.
In "Event details" it shows me two errors:
1) For e-mail notifacation: Cannot connect to SMTP server [my_snmp_server] [Cannot create socket...