I designed the campaign and scheduled to send the emails to all subscribers. But the system doesn't sent the email, I'm not sure where I made mistakes.
@dev - Did you sent campaigns in the past and they worked and now this is the only one with issues?
You can schedule the campaign in the past, like 1 day ago to force it send immediatly, that is, if your cron jobs are all set as they should.
Updated the Campaign and this message appeared.
"Your campaign(regular) named "Mail Campaign" has been successfully saved and will start sending at 3/18/17, 7:00 AM!"