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https://blog.it-kb.ru/2017/03/02/deploy-and-configure-icinga-2-on-debian-8-part-9-icinga-director-1-3-and-email-notification-with-plugin-command-and-custom-shell-script-with-additional-arguments/
Развёртывание и настройка Icinga 2 на Debian 8.6. Часть 9. Настройка e-mail оповещений в Icinga Director 1.3