node-mail-relay
Overview
A simple node.js / express server for relaying email from a client to an email address. Configuration is set in environment variables and passed to a nodemailer transport.
For example, I use this to intercept encrypted form data from a client contact page. After decrypting the data, and building the transport, the data is sent to my gmail account.
Install
Simply fork or directly clone into your own directory.
Then in the terminal run npm install for dependencies.
Usage
Incoming data must be formatted correctly.
Code Examples (Client)
The following code samples show what the client-side code might look like (client not included).
The data we want to include in the email:
let payload = {
fullName: <user name>,
email: <user's email>,
subject: <user's subject>,
body: <user's message>
}
I then encrypt the payload using Crypto-JS. Expanded for readability:
let payloadJSON = JSON.stringify(payload);
let encrypted = CryptoJS.AES.encrypt(
payloadJSON, process.env.SECRET_HANDSHAKE);
encrypted = encrypted.toString();
Next, the client sends a fetch request to the server:
fetch(process.env.SERVER_ADDRESS, {
method: 'POST',
headers: {
Accept: "application/json",
"Content-Type": "application/json"
},
body: JSON.stringify({
encrypted
})
})...(handle then, catch, etc)
Environment Variables
All environment variables should be placed in a .env file at the root of the project.
CLIENT (not included!)
SERVER_ADDRESS:
SECRET_HANDSHAKE:
PS - you can name them whatever you want as long as they match the code.
SERVER
AUTH_DOMAIN: A domain you authorize to send you data
EMAIL_SERVICE: Email service nodemailer will connect to
AUTH_USER: Email account to receive emails at EMAIL_SERVICE
AUTH_PW: Password for your email account at EMAIL_SERVICE
SECRET_HANDSHAKE: A secret password sent from the client. Must match!
For more information on how to configure the nodemailer options, see https://nodemailer.com/about/.
Modules Used
Testing
License
node-mail-relay is licensed under the MIT license