eelmail

email server providing imap and smtp

quick start

Let's set up an email server that sounds like a fun thing to do why not.

start a server as root

We can start a server as root so that it can listen on low ports (25 and 143) used by smtp and imap:

$ sudo eelmail server -d ./maildb

This isn't so great for security, so you probably want to drop privileges inside the server with --uid and --gid:

$ sudo eelmail server -d ./maildb --uid=$UID --gid=$GROUPS

add accounts

Once the server is running, create a user account:

$ eelmail -d ./maildb users create substack \
  --login.basic.username=substack --login.basic.password=beepboop

You can also pass in the datadir with $EELMAIL_DATADIR.

If it worked, eelmail users list should now show your username:

$ eelmail users list
substack

Repeat for additional user accounts you wish to configure.

sanity check

Now that the server is running and accounts are configured, let's send a test email. Here I'm using substack.net but you should replace that with your own domain.

Make sure you have netcat installed then do:

$ nc substack.net 25 <<END
> helo localhost
> mail from: [email protected]
> rcpt to: [email protected]
> data
> subject: yo
> 
> beep boop
> .
> quit
> END
220 beep
250 localhost
250
250
354
250
221 Bye!

Now make sure you have an email server (like postfix on linux) running locally and do:

$ fetchmail -p imap -u substack substack.net
Enter password for [email protected]: 
1 message for substack at substack.net.
reading message [email protected]:1 of 1 (17 header octets) (9 body octets) flushed

Enter the password that you configured and if it worked, you should now have mail in your local inbox.

Type mail to read your email:

$ mail
"/var/mail/substack": 1 message 1 new
>N   1 [email protected] Fri Sep 26 09:51  18/728   yo
? n
Return-Path: <[email protected]>
X-Original-To: [email protected]
Delivered-To: [email protected]
Received: from beep (beep [IPv6:::1])
    by beep (Postfix) with ESMTP id 5C06D740061
    for <[email protected]>; Fri, 26 Sep 2014 09:51:41 -0700 (PDT)
Received: from localhost.localdomain [::1]
    by beep with IMAP (fetchmail-6.3.21)
    for <[email protected]> (single-drop); Fri, 26 Sep 2014 19:51:41 +0300 (IDT)
Received: from localhost.localdomain [::1]
    by beep with IMAP (fetchmail-6.3.21)
    for <[email protected]> (single-drop); Fri, 26 Sep 2014 19:47:56 +0300 (IDT)
subject: yo
Message-Id: <20140926165141.5C06D740061@beep>
Date: Fri, 26 Sep 2014 09:51:41 -0700 (PDT)
From: [email protected]

beep boop
? 

api example

You can also create your own server from the api:

var eelmail = require('eelmail');
var level = require('level-party');

var db = level('./data/db');
var em = eelmail(db, { dir: './data' });

em.createServer('smtp').listen(25);
em.createServer('imap').listen(143);

Here we use level-party so that the user accounts can be modified while the server is running with the eelmail users command. Just make sure that -d matches the data dir.

usage

Usage: eelmail COMMAND...

  eelmail {OPTIONS} users ...

    Manage eelmail user accounts.
    Run `eelmail users -h` for the list of commands.

  eelmail server {OPTIONS}

    Start an imap and smtp server.

    --ports.smtp  port to use for smtp (default: 25)
    --ports.imap  port to use for imap (default: 143)

    To use ssl for imap, specify one of:

    --imap.cert / --imap.key  paths of tls cert and key files
    --imap.pfx                path of pfx file

  eelmail help

    Show this message.

Global options:

  -d, --dir  directory to use to store data
             default: $EELMAIL_DATADIR or ./eelmail.db

methods

var eelmail = require('eelmail')

var em = eelmail(db, opts)

Create an eelmail instance em from a db and opts.

var server = em.createServer(type, opts)

Create a server for type:

• 'imap' - service to fetch saved emails
• 'imaps' - imap over ssl
• 'smtp' - service to receive emails
• 'smtps' - smtp over ssl

For 'imaps', 'smtp', and 'smtps' you'll need to supply opts.key/opts.cert or opts.pfx.

em.close()

Close the database.

install

With npm, to get the eelmail command, do:

npm install -g eelmail

and to get the library, do:

npm install eelmail

license

MIT