The number of emails you can send each day depends on your Amazon Web Services (AWS) Account. Amazon SES (Simple Email Service) sets a daily limit, not MailBluster. Initially, after moving out of Amazon SES Sandbox, AWS will give you a daily sending limit of 50k emails per day (within 24 hours). Actually your AWS Account decides this limit, which might be 50k, 60k or even 100k emails within 24 hours depending on your previous sending reputation (if you have any). MailBluster uses this AWS Account to send newsletters and marketing campaigns because it doesn’t provide SMTP server or services. If you follow good practices and have a good reputation later, then Amazon SES might increase your daily sending limit if you request them properly.