Our server process millions of emails a day, so the number of emails that can be sent within 24 hours is very high. But there are however some limits that one shouldn't forget.
In fact, the weight of your emails (and attachments if any), or the speed of your connection play a key role about the number of emails that can be sent.
The maximum email size limit is 1MB for each message. If you want to send emails that exceed this limit, you should contact our technical staff here.