@Override
	protected String toDSL() {
		return String.format("mail --host=localhost --port=%d --from=%s --to=%s --subject=%s", port, from, to, subject);
	}
A fixture to help test the {@code mail} sink module. Allows retrieval of emails sent to the configured server.

@author Eric Bottard
spring-xd-test-fixtures/src/main/java/org/springframework/xd/test/fixtures/MailSink.java