feat: Scheduler

I'd like my mails to only be sent at certain hours for example: between 9 AM and 5 PM.

[kumarabhirup]

The bulk-mail-cli configuration has an interval config that can take a cron setting.

So what you want is technically achievable in bulk-mail-cli v2.

{
...
"configuration": {
    "mailInterval": "*/10 * * * * *", // Cron Expression: To mail every 10 seconds [ >= 10 seconds recommended ]
  }
...
}

Reference Link: https://stackoverflow.com/questions/41743720/crontab-run-every-15-minutes-between-certain-hours

In case I am incorrect or something doesn't work, let me know, I can create a separate feature for this :D

[koppor]

I don't understand the semantics of mailInterval. A) Is the same email sent each 10 seconds to all receipient? B) Is the same email mails once to one receipient and then in next interval to the next one?

Refs #27

[kumarabhirup]

Yes. It's B). It sends email once and then after the interval to the next one and so on.

By the way, make sure you set the cron string to at least 2 minutes as the cron has hard time working with seconds. Will add this in next update.