You can have only one notificator.telegram.key in the system
No.
You can specify server personal data for mail.
When there is one channel for a large system, it is not reliable.
No.
You can specify server personal data for mail.
When there is one channel for a large system, it is not reliable.
You can set a Chat ID for the user.
Is it possible to set a personal notificator.telegram.key?