node-pop3

pop3 command for node. Supports Promise and stream.

CLI

e.g. Test the API about TOP

pop -u [email protected] -p pwd -h example.pop.com -m TOP 100 10

or pass in some or all of the config in a designated config file (JSON or JS):

pop -c pop.config.js -m TOP 100 10

For more detail, please input

pop --help

Usage

In CommonJS, you can get the Pop3Command as follows:

const Pop3Command = require('node-pop3');

The examples below, however, use the ESM Modules format instead (i.e., import).

Example

• Fetch mail by msgNum:

import Pop3Command from 'node-pop3';

const pop3 = new Pop3Command({
  user: '[email protected]',
  password: 'example',
  host: 'pop3.example.com',
});

const msgNum = 1;

(async () => {

  await string = pop3.RETR(msgNum);
  // deal with mail string
  await pop3.QUIT();

})();

• List msgNum to uid in Server

const list = await pop3.UIDL();
console.dir(list);
/**
 * [
 *  ['1', 'ZC0113-H8wi_YChVab4F0QTbwP4B6i'],
 *  ['2', 'ZC0114-3A9gAn8M2Sp1RhVCGTIII6i'],
 *  ...
 * ]
*/

API

• constructor(options)

params	optional	comment
options.user	no	String
options.password	no	String
options.host	no	String
options.port	yes	Number. Defaults to 110
options.servername	yes	String. Defaults to host value. Same as servername for Node TLS option.
options.tls	yes	Boolean. Defaults to false
options.timeout	yes	Number. Defaults to undefined
options.tlsOptions	yes	Defaults to {}

tlsOptions takes the options documented for your Node version and tls.connect function.

• basic

method	params	return
connect		{Promise} resolve to undefined
command	{String*} command messages to Server	{Promise} resolve to {Array[String, Stream]}, which are messages of response and stream of response (if the response has multiple lines) from Server

const pop3 = new Pop3Command({ host: 'pop3.example.com' });

(async () => {

  await pop3.connect();
  await pop3.command('USER', '[email protected]');
  await pop3.command('PASS', 'example');

  const [info] = await pop3.command('STAT');
  console.log(info); // 100 102400

  const [info, stream] = await pop3.command('RETR', 1);
  console.log(info); // 1024 octets

  const [info] = await pop3.command('QUIT');
  console.log(info); // Bye

})();

• common

method	params	return	comment
UIDL	{String|Number} msgNum	{Promise} resolve to {Array} list of responsed	msgNum is optional
RETR	{String|Number} msgNum	{Promise} resolve to {String} of mail stream
TOP	{String|Number} msgNum, {Number} n	{Promise} resolve to {String} message of responsed	n is default to 0
QUIT		{Promise} resolve to {String} message of response message

ERROR

pop3 will throw new Error's with an error message from Server. Beyond that, Error may have two properties attached by pop3.

property	comment
err.eventName	event name comes from socket.on. Includes error, close, timeout, end, and bad-server-response. command may also throw no-socket.
err.command	which command causes the error. For example, PASS example

To-dos

1. Testing:
   1. Ensure tests seed (and then delete) messages (e.g., using emailjs)
   2. Set up CI with hidden pop.config.json credentials
   3. Avoid skipping some tests
2. Edge cases
   1. After timeout, ensure any stream is ended (so other commands can continue)
   2. Ensure command will reject if socket is ended.
   3. Ensure in fixing the above that can QUIT and reuse same instance