Basically, there is no such thing as daily limits at Sender.net. If you’re using a monthly plan, you can email as many subscribers as your plan allows you to have(e.g. If you have a plan for 5000 subscribers, you can email all of them as often as you like, bearing in mind the monthly 60 000 email limit) . If you’re using the credit system, only the limitation of total emails applies – one credit equals to one email.