Zoho Mail SMTP Settings (2026)

# Python - Using smtplib (standard library)
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart

# Zoho SMTP Configuration
# Use the correct regional server for your account!
SMTP_HOST = "smtp.zoho.com"      # Personal US account
# SMTP_HOST = "smtppro.zoho.com"  # Business US account
# SMTP_HOST = "smtp.zoho.eu"      # EU region
# SMTP_HOST = "smtp.zoho.in"      # India region

SMTP_PORT = 465  # SSL port
ZOHO_EMAIL = "your-email@zohomail.com"
ZOHO_PASSWORD = "your-password-or-app-password"

def send_email(to_email, subject, body):
    # Create message
    msg = MIMEMultipart()
    msg['From'] = ZOHO_EMAIL
    msg['To'] = to_email
    msg['Subject'] = subject
    msg.attach(MIMEText(body, 'plain'))

    # Connect and send using SSL
    with smtplib.SMTP_SSL(SMTP_HOST, SMTP_PORT) as server:
        server.login(ZOHO_EMAIL, ZOHO_PASSWORD)
        server.send_message(msg)
        print("Email sent successfully!")

# Alternative: Using STARTTLS (port 587)
def send_email_tls(to_email, subject, body):
    msg = MIMEMultipart()
    msg['From'] = ZOHO_EMAIL
    msg['To'] = to_email
    msg['Subject'] = subject
    msg.attach(MIMEText(body, 'plain'))

    with smtplib.SMTP(SMTP_HOST, 587) as server:
        server.starttls()
        server.login(ZOHO_EMAIL, ZOHO_PASSWORD)
        server.send_message(msg)

# Usage
send_email(
    "recipient@example.com",
    "Hello from Zoho!",
    "This email was sent via Zoho Mail SMTP."
)

// PHP - Using PHPMailer
// Install: composer require phpmailer/phpmailer

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

require 'vendor/autoload.php';

$mail = new PHPMailer(true);

try {
    // Server settings
    $mail->isSMTP();
    $mail->Host       = 'smtp.zoho.com';  // Use correct regional server
    $mail->SMTPAuth   = true;
    $mail->Username   = 'your-email@zohomail.com';
    $mail->Password   = 'your-password-or-app-password';
    $mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;
    $mail->Port       = 465;

    // For Business accounts:
    // $mail->Host = 'smtppro.zoho.com';

    // Recipients
    $mail->setFrom('your-email@zohomail.com', 'Your Name');
    $mail->addAddress('recipient@example.com');

    // Content
    $mail->isHTML(true);
    $mail->Subject = 'Hello from Zoho!';
    $mail->Body    = 'This is a <b>test email</b> sent via Zoho SMTP.';
    $mail->AltBody = 'This is a test email sent via Zoho SMTP.';

    $mail->send();
    echo 'Email sent successfully!';
} catch (Exception $e) {
    echo "Failed to send: {$mail->ErrorInfo}";
}

// Node.js - Using Nodemailer
// Install: npm install nodemailer

const nodemailer = require('nodemailer');

// Select the correct regional server for your account
const ZOHO_SERVERS = {
    us: 'smtp.zoho.com',        // Personal US
    us_pro: 'smtppro.zoho.com', // Business US
    eu: 'smtp.zoho.eu',        // Europe
    eu_pro: 'smtppro.zoho.eu', // Business Europe
    in: 'smtp.zoho.in',        // India
    au: 'smtp.zoho.com.au',   // Australia
};

// Create transporter with Zoho SMTP
const transporter = nodemailer.createTransport({
    host: ZOHO_SERVERS.us, // Change to your region
    port: 465,
    secure: true,
    auth: {
        user: 'your-email@zohomail.com',
        pass: 'your-password-or-app-password'
    }
});

// Send email
async function sendEmail() {
    try {
        const info = await transporter.sendMail({
            from: '"Your Name" <your-email@zohomail.com>',
            to: 'recipient@example.com',
            subject: 'Hello from Zoho!',
            text: 'This email was sent via Zoho SMTP.',
            html: '<p>This email was sent via <b>Zoho SMTP</b>.</p>'
        });

        console.log('Email sent:', info.messageId);
    } catch (error) {
        console.error('Error sending email:', error);
    }
}

sendEmail();

# Ruby - Using Mail gem
# Install: gem install mail

require 'mail'

# Configure Zoho SMTP
Mail.defaults do
  delivery_method :smtp, {
    address:              'smtp.zoho.com',  # Use correct regional server
    port:                 465,
    user_name:            'your-email@zohomail.com',
    password:             'your-password-or-app-password',
    authentication:       :login,
    ssl:                  true,
    tls:                  true,
    enable_starttls_auto: true
  }
end

# Create and send email
mail = Mail.new do
  from     'your-email@zohomail.com'
  to       'recipient@example.com'
  subject  'Hello from Zoho!'
  body     'This email was sent via Zoho Mail SMTP.'
end

mail.deliver!
puts "Email sent successfully!"

// Go - Using net/smtp and crypto/tls
package main

import (
    "crypto/tls"
    "fmt"
    "net/smtp"
    "strings"
)

func main() {
    // Zoho SMTP Configuration - use correct regional server!
    smtpHost := "smtp.zoho.com"  // Personal US
    // smtpHost := "smtppro.zoho.com"  // Business US
    // smtpHost := "smtp.zoho.eu"      // Europe
    smtpPort := "465"
    zohoEmail := "your-email@zohomail.com"
    zohoPassword := "your-password-or-app-password"

    // Email content
    to := []string{"recipient@example.com"}
    subject := "Hello from Zoho!"
    body := "This email was sent via Zoho SMTP using Go."

    // Build message
    message := strings.NewReader(
        "From: " + zohoEmail + "\r\n" +
        "To: " + strings.Join(to, ",") + "\r\n" +
        "Subject: " + subject + "\r\n" +
        "MIME-Version: 1.0\r\n" +
        "Content-Type: text/plain; charset=\"utf-8\"\r\n" +
        "\r\n" + body,
    )

    // TLS config
    tlsConfig := &tls.Config{ServerName: smtpHost}

    // Connect with SSL
    conn, err := tls.Dial("tcp", smtpHost+":"+smtpPort, tlsConfig)
    if err != nil {
        panic(err)
    }

    client, err := smtp.NewClient(conn, smtpHost)
    if err != nil {
        panic(err)
    }
    defer client.Close()

    // Authenticate
    auth := smtp.PlainAuth("", zohoEmail, zohoPassword, smtpHost)
    if err = client.Auth(auth); err != nil {
        panic(err)
    }

    // Send email
    if err = client.Mail(zohoEmail); err != nil {
        panic(err)
    }
    for _, addr := range to {
        if err = client.Rcpt(addr); err != nil {
            panic(err)
        }
    }

    w, err := client.Data()
    if err != nil {
        panic(err)
    }
    _, err = message.WriteTo(w)
    if err != nil {
        panic(err)
    }
    w.Close()

    client.Quit()
    fmt.Println("Email sent successfully!")
}