curl -s --user 'api:d87155abd5aad411fe5d7f38ba79d31b-ea41613b-ede5e5c0' \
  https://api.mailgun.net/v3/sandboxa31d7db12db14085baa0eead9d57760c.mailgun.org/messages \
  -F from='Mailgun Sandbox <postmaster@sandboxa31d7db12db14085baa0eead9d57760c.mailgun.org>' \
  -F to='Mailgun tixko <mailgun@tixko.co.th>' \
  -F subject='Hello Mailgun tixko' \
  -F text='Congratulations Mailgun tixko, you just sent an email with Mailgun! You are truly awesome!' \