My own mailer wannabe inspired by Lift mailers

Client.scala

object AuthMailer extends Mailer {
  def sendWelcomeEmail(account: Account)(implicit settings: MailerSettings) {
    val subject = "[Progstr Filer] Welcome to Progstr Filer!"
    send(
      From("[email protected]", "Mysite Support"),
      To(account.email -> account.name),
      Subject(subject),
      HtmlTemplate("welcome-html",
        'name -> "Hristo", 'subject -> subject, 'account -> account),
      TextTemplate("welcome-text",
        'name -> "Hristo", 'subject -> subject, 'account -> account)
    )
  }
}

Mailer.scala

import org.apache.commons.mail._
import org.fusesource.scalate._

trait Mailer {
  type Address = (String, String)
  type Attribute = (Symbol, Any)

  def send(commands: EmailCommand*)(implicit settings: MailerSettings) {
    val email = new HtmlEmail
    email.setHostName(settings.server)

    for (command <- commands) {
      command match {
        case From(address, name) => email.setFrom(address, name)
        case To((address, name)) => email.addTo(address, name)
        case Cc((address, name)) => email.addCc(address, name)
        case Bcc((address, name)) => email.addBcc(address, name)
        case Subject(text) => email.setSubject(text)
        case Text(text) => email.setTextMsg(text)
        case TextTemplate(location, attributes) =>
          email.setTextMsg(renderTemplate(location, attributes))
        case Html(text) => email.setHtmlMsg(text)
        case HtmlTemplate(location, attributes) =>
          email.setHtmlMsg(renderTemplate(location, attributes))
      }
    }
    email.send();
  }

  lazy val engine = new TemplateEngine {
    override def isDevelopmentMode = Settings.environment.name == "dev"
  }

  def renderTemplate(location: String, attributes: Map[String, Any] = Map.empty): String = {
    val withExtension = if (location.toLowerCase endsWith(".ssp"))
      location
    else
      location + ".ssp"
    engine.layout(templatePath + "/" + withExtension, attributes)
  }

  def templatePath = getClass.getPackage.getName.replace(".", "/")
}