If you think that you can send 10000 emails for free then you are wrong. No service in the world will allow you to send 10000 emails for free at once. Email hosting companies like Gmail, Yahoo, and Outlook have a limit of daily recipients of 500 and consider you to be a spammer for trying to send more. Bulk email hosting services like SendPulse or Mailchimp allow you to send emails in huge numbers. However, with SendPulse, you only have to pay $32 for sending 10000 emails while MailChimp will cost you $200 for doing so. Moreover, SendPulse has a free plan that allows you to send up to 15000 monthly emails to 500 recipients.