🚀 📧 Send Emails using Gmail SMTP (PHP)

🟢 Step 1: Download PHPMailer

👉 Go to:
https://github.com/PHPMailer/PHPMailer

Click Code → Download ZIP
Extract and copy the folder into your project.

📁 Structure

contact-form/
│── PHPMailer/
│── index.php
│── send.php

🟡 Step 2: Enable Gmail SMTP Access

🔐 Important (Very Important Step)

Go to: https://myaccount.google.com/security
Enable 2-Step Verification
Then go to:
👉 https://myaccount.google.com/apppasswords
Generate App Password

👉 Select:

App: Mail
Device: Other → type “PHP”

✅ Copy the 16-digit password

🔵 Step 3: Create Email Sending File (send.php)

<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;require 'PHPMailer/src/Exception.php';
require 'PHPMailer/src/PHPMailer.php';
require 'PHPMailer/src/SMTP.php';$mail = new PHPMailer(true);try {
    // 🔹 Server settings
    $mail->isSMTP();
    $mail->Host       = 'smtp.gmail.com';
    $mail->SMTPAuth   = true;
    $mail->Username   = 'yourgmail@gmail.com'; // your Gmail
    $mail->Password   = 'your_app_password';   // App Password
    $mail->SMTPSecure = 'tls';
    $mail->Port       = 587;    // 🔹 Sender & Receiver
    $mail->setFrom('yourgmail@gmail.com', 'Your Website');
    $mail->addAddress('receiver@gmail.com'); // where you want to receive    // 🔹 Content
    $mail->isHTML(true);
    $mail->Subject = 'New Contact Form Message';
    $mail->Body    = '<b>Hello!</b> This is a test email from PHP SMTP.';    $mail->send();
    echo "✅ Email sent successfully!";} catch (Exception $e) {
    echo "❌ Email failed: {$mail->ErrorInfo}";
}

🟣 Step 4: Connect with Contact Form

Update your process.php:

$messageBody = "
Name: $name <br>
Email: $email <br>
Message: $message
";$mail->Body = $messageBody;

🔴 Step 5: Test It

Run project on localhost / live server
Submit form
Check your email inbox 📩

⚠️ Common Errors & Fixes

❌ 1. Authentication Failed

👉 Fix:

Use App Password, NOT Gmail password

❌ 2. Could not connect to SMTP

👉 Fix:

Check internet
Use correct port (587)

❌ 3. SSL Error

👉 Try:

$mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;

🔐 Security Tips (Important)

✔ Never expose password in public code
✔ Use .env file (advanced)
✔ Validate form before sending email
✔ Limit spam (use reCAPTCHA)

🎯 Pro Version (Best Practice)

Use this config:

$mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;
$mail->Port = 587;

🚀 Final Result

Now your contact form can:
✅ Send real emails
✅ Work like professional websites
✅ Be used for clients / business

🇮🇳 Amazon India 🌍 Amazon Global

complete step-by-step guide to send emails using Gmail SMTP in PHP