public static void Main() { Mailgun.Init("key-afy6amxoo2fnj$u@mc"); Mailbox mailbox = new Mailbox("new1", "samples.mailgun.org", "123123"); try { // Create new mailbox mailbox.Upsert(); // Update it mailbox.Password = "******"; mailbox.Upsert(); // Upsert from CSV Mailbox.UpsertFromCsv(Encoding.UTF8.GetBytes("[email protected], abc123\[email protected], 321bca")); //Now enjoy the scene: List <Mailbox> list = Mailbox.Find(); Console.WriteLine("Mailboxes:\n"); foreach (Mailbox m in list) { Console.WriteLine("{0}@{1} {2}", m.User, m.Domain, m.Size); } } catch (MailgunException ex) { Console.WriteLine(ex.StackTrace); Console.WriteLine(ex.Message); } }