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Express Mail Gateway

This nodejs (Express JS) application will be used as mail gateway to hide sensitive information from the frontend. It is built as API gateway which receives a post request and enriches the message with the sensitive data and forwards everything to the mail gateway via SMTP provider.

Author

This repository was originally forked from 🔗 schadokar/nodemailer-app and enhanced with a couple of code snippets and a MCaptcha integration.

Installation

Clone the repository to your local folder:

git clone <reponame>

Install the nodejs dependencies with npm.

npm i

Configuration

Configure the application by using environment variables or a .env file with the following parameters.

SMTP_USER=<SMTP_USER>
SMTP_PASS=<SMTP_PASSWORD>
SMTP_DOMAIN=<SMTP_DOMAIN>
SMTP_PORT=<Port to be used e.g. 25>
MAIL_RECIPIENT=List-of@mail-recipiens.com,
MCAPTCHA_SECRET=verylongstringoflettersandnumbers
MCAPTCHA_URL=https://yoururl.tld/

Run the application

Dev mode:

npm run dev

Productive:

npm run start

Sample API Request

POST http://<hostname>:3000/api/v1/sendmail

REQUESTBODY

{
    "from": "requester@sample.com",
    "subject": "Subject for the mail",
    "message": {
        "test1":"test1Value",
        "test2":"test2Value"
    },
    "captcha_token": "yourretrievedtokenfromMCaptcha",
    "captcha_sitekey": "yourpublicsitekeyfromMCaptcha",
}