Our email sending limit is 100 email messages per hour and 50 recipients per message, if you require more, the only suggestion we have is that you contact your ISP and see if they will allow you to use their SMTP server and if they do, what their sending limits are.
If they allow you to use their SMTP server, then we suggest you to use a pop email client program such as Outlook Express to send and receive emails from your Doteasy account.