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.