libraryDependencies += "io.github.roman0x58" %% "pencilmail" % "3.0.5"

val email = Email.text(
      from"user name <[email protected]>",
      to"[email protected]",
      subject"first email",
      Body.Ascii("hello")
)

val email = Email.mime(
     from"[email protected]",
     to"[email protected]",
     subject"привет",
     Body.Utf8("hi there")
) + attachment"path/to/file"

val email = Email.mime(
     from"[email protected]",
     to"[email protected]",
     subject"привет",
     Body.Alternative(List(Body.Utf8("hi there3"), Body.Ascii("hi there2")))
)

object Main extends IOApp {

  val logger = Slf4jLogger.getLogger[IO]

  override def run(args: List[String]): IO[ExitCode] = {
    val credentials = Credentials(
      Username("[email protected]"),
      Password("password")
    )
    val action = for {
      tls <- Network[IO].tlsContext.system
      client = Client[IO](
        address = SocketAddress(host"localhost", port"25"),
        mode = SmtpMode.Plain,
        credentials = Some(credentials),
        tlsContext = tls,
        logger = logger)
      response <- client.send(email)
    } yield response

    action.attempt.flatMap {
      case Right(replies) =>
        logger.debug(replies)
      case Left(error) =>
        error match {
          case e: Error => logger.debug(e.toString)
          case e: Throwable => logger.debug(e.getMessage)
        }
    }.unsafeRunSync()
  }
}