smtp-dump

This tool provides a Node.js SMTP Server that dumps all mails to disk. It can be used to test SMTP Clients or simulate SMTP Servers for Development reasons.

Installation

git clone https://github.com/snsttr/smtp-dump.git
cd smtp-dump
npm install

Usage

node smtp-dump.js

smtp-dump.js will write out all E-Mails into the default output folder ./output while running. The E-Mail will not be send to the destination Mail Server.

The SMTP Server does not require a username and/or a password. Also secure connections are not possible, yet.

optional Arguments

Specify the logging destination by passing a path to --output (default directory is output). Creates the directory if it does not exist.

node smtp-dump.js --output=dump
node smtp-dump.js --output=/home/smtp-dump
node smtp-dump.js --output=C:\smtp-dump

Specify the port for the SMTP Server by passing a number (1 - 65536) to --port (default Port is 25)

node smtp-dump.js --port=10025

Debugging ouput (console) is enabled if you use --logger (default is disabled).

node smtp-dump.js --logger

Example

Start smtp-dump.js with output directory ./dump, port 10025 and logging activated.

    node smtp-dump.js --output=dump --port=10025 --logger

Now enter the settings to your SMTP Server in your SMTP Client Application (usually on localhost). As soon as the client tries to send an E-Mail using the specified SMTP Server the smtp-dump.js writes the Mail as a txt-File into the specified output directory:

Message-ID: <823a882740c0361723b9951939d501ee8347@example.com>
Date: Thu, 29 Dec 2016 15:54:13 +0100
Subject: Test E-Mail
From: Test Client <noreply@example.com>
To: test@example.com
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

This is a Test Message

Since we used --logger the smtp-dump.js outputs some information to the command line:

[2017-02-16 14:34:54] INFO: SMTP Server listening on [::]:10025
[2017-02-16 14:35:46] INFO: [82Suh8w7238+O] Connection from [127.0.0.1]
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 220 localhost ESMTP
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: EHLO example.com
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 250-localhost Nice to meet you, [127.0.0.1]
250-PIPELINING
250-8BITMIME
250-SMTPUTF8
250-AUTH LOGIN PLAIN
250 STARTTLS
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: MAIL FROM: <noreply@example.com>
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 250 Accepted
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: RCPT TO: <test@example.com>
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 250 Accepted
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: DATA
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 354 End data with <CR><LF>.<CR><LF>
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: <701 bytes of DATA>
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 250 OK: message queued
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: MAIL FROM: <noreply@example.com>
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 250 Accepted
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: RCPT TO: <test@example.com>
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 250 Accepted
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: DATA
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 354 End data with <CR><LF>.<CR><LF>
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: <706 bytes of DATA>
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 250 OK: message queued
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] C: QUIT
[2017-02-16 14:35:46] DEBUG: [82Suh8w7238+O] S: 221 Bye
[2017-02-16 14:35:46] INFO: [82Suh8w7238+O] Connection closed to [127.0.0.1]