title: Is it possible to send an email from PHP without using the SMTP server
body: <p>I need to send a newsletter to several thousands of subscribers with PHP.
  The hosting service I am using allows me to send 300 mails/hour tops with their SMTP server.</p>
  
  <p>They told me that if I send email with PHP without authenticating or using the SMTP server I won't have any problems with limits.</p>
  
  <p>Is that even possible? Doesn't the mail() function in PHP use SMTP to send mail?</p>