SmtpCove

Node.jsUsing SmtpCove with Nodemailer

Nodemailer is the most popular email library for Node.js. To use SmtpCove, create a transporter pointing at the sandbox host and drop in your generated credentials. No TLS certificate verification is required in the sandbox.

const nodemailer = require('nodemailer');

// 1. Create SmtpCove transporter
const transporter = nodemailer.createTransport({
  host: 'sandbox.mail.od2.in',
  port: 2525,             // also works on 587
  secure: false,          // use STARTTLS, not SSL
  auth: {
    user: 'YOUR_SANDBOX_USERNAME',   // e.g. [email protected]
    pass: 'YOUR_SANDBOX_PASSWORD',
  },
});

// 2. Send a test email, it will appear in your SmtpCove inbox
await transporter.sendMail({
  from: '"My App" <[email protected]>',
  to: '[email protected]',
  subject: 'Welcome! Verify your account',
  text: 'Your OTP is: 482910',
  html: '<h1>Your OTP is <strong>482910</strong></h1>',
});

console.log('Email captured in SmtpCove sandbox ✓');

PythonUsing SmtpCove with Django & smtplib

In Django, override your settings.py email backend for staging. In raw Python, use smtplib with STARTTLS. Both connect identically to SmtpCove.

# Django settings.py (staging)
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST     = 'sandbox.mail.od2.in'
EMAIL_PORT     = 2525
EMAIL_USE_TLS  = True
EMAIL_HOST_USER     = 'YOUR_SANDBOX_USERNAME'
EMAIL_HOST_PASSWORD = 'YOUR_SANDBOX_PASSWORD'

# --- OR raw smtplib ---
import smtplib
from email.mime.text import MIMEText

msg = MIMEText('<h1>OTP: 482910</h1>', 'html')
msg['Subject'] = 'Verify your account'
msg['From']    = '[email protected]'
msg['To']      = '[email protected]'

with smtplib.SMTP('sandbox.mail.od2.in', 2525) as s:
    s.starttls()
    s.login('YOUR_SANDBOX_USERNAME', 'YOUR_SANDBOX_PASSWORD')
    s.send_message(msg)
    print('Captured in SmtpCove ✓')

PHPUsing SmtpCove with Laravel & WordPress

Laravel reads SMTP config from .env. WordPress uses a plugin like WP Mail SMTP. In both cases, just swap the host, port, and credentials for your sandbox values.

MAIL_MAILER=smtp
MAIL_HOST=sandbox.mail.od2.in
MAIL_PORT=2525
MAIL_USERNAME=YOUR_SANDBOX_USERNAME
MAIL_PASSWORD=YOUR_SANDBOX_PASSWORD
MAIL_ENCRYPTION=tls
MAIL_FROM_ADDRESS="[email protected]"
MAIL_FROM_NAME="${APP_NAME}"

Best Practice: Use Environment Variables

Never hardcode SMTP credentials. Store them in environment variables and switch between sandbox and production with a single env flag. Here is a recommended pattern that works across Node.js, Python, and PHP apps:

SMTP_HOST=sandbox.mail.od2.in
SMTP_PORT=2525
SMTP_USER=YOUR_SANDBOX_USERNAME
SMTP_PASS=YOUR_SANDBOX_PASSWORD
[email protected]

SMTP_HOST=smtp.sendgrid.net
SMTP_PORT=587
SMTP_USER=apikey
SMTP_PASS=SG.xxxxxxxxxxxxxxxxxxxx
[email protected]

Troubleshooting Common Connection Errors