# Send this mail using the `sendmail` command
	#
	# require: `sendmail_is_available`
	fun send: Bool
	do
		assert sendmail_is_available

		# All recipients
		var all = new Array[String]
		all.add_all to
		all.add_all cc
		all.add_all bcc

		var proc = new ProcessWriter("sendmail", all.join(","))
		if proc.is_writable then proc.write to_s
		proc.close
		proc.wait
		var status = proc.status
		return status == 0
	end