Is your feature request related to a problem? Please describe.
As most notification services are HTTP based and there can be network issues, it would be nice to have a retry option to retry each service x times on error. A global retry over all services would be bad as it can result in double messages if only one service failed, so it should be per service.

Describe the solution you'd like
A retry count with an configurable additional sleep in between retries. The retry should be per service

Describe alternatives you've considered

Additional context