public static void main(String[] args) throws MessagingException, IOException {
Properties props = new Properties();
try (InputStream in = Files.newInputStream(Paths.get("mail", "mail.properties"))) {
props.load(in);
}
List<String> lines = Files.readAllLines(Paths.get(args[0]), Charset.forName("UTF-8"));
String from = lines.get(0);
String to = lines.get(1);
String subject = lines.get(2);
StringBuilder builder = new StringBuilder();
for (int i = 3; i < lines.size(); i++) {
builder.append(lines.get(i));
builder.append("\n");
}
Console console = System.console();
String password = new String(console.readPassword("Password: "));
Session mailSession = Session.getDefaultInstance(props);
// mailSession.setDebug(true);
MimeMessage message = new MimeMessage(mailSession);
message.setFrom(new InternetAddress(from));
message.addRecipient(RecipientType.TO, new InternetAddress(to));
message.setSubject(subject);
message.setText(builder.toString());
Transport tr = mailSession.getTransport();
try {
tr.connect(null, password);
tr.sendMessage(message, message.getAllRecipients());
} finally {
tr.close();
}
}