Caution, using an SMTP provider like Mail Gun or Sendgrid limits our ability to track replies. Although you may send much higher volumes, please anticipate having to manually finish leads and manually handle replies. Also be sure to set the reply to setting in your email provider to the same IMAP account in Super Send. IMAP is what we use to read your inbox.
It is possible to configure sending from Mail Gun or Sendgrid or Amazon SES
For Amazon SES set your Send As to Your name <Your email> otherwise it will use the ugly smtp username.