Bulk Email Sending with MailWizz – Complete Guide

If you’re looking to send bulk emails efficiently, MailWizz is a great solution. It’s a powerful email marketing platform that allows you to manage campaigns, track email performance, and automate marketing efforts. However, to ensure high inbox delivery, you need a properly configured SMTP server with PowerMTA, and most importantly, port 25 must be enabled on your server.

In this guide, we’ll walk you through setting up MailWizz for bulk emailing, configuring SMTP with PowerMTA, and ensuring high delivery rates.

Related: How to Set Up PowerMTA on Linode for Bulk Emails

Step 1: Install MailWizz on Your Server

To get started, follow these steps to install MailWizz on your server:

1. Purchase MailWizz from Here.
2. Upload the MailWizz package to your web server.
3. Extract the files and set up a MySQL database for MailWizz.
4. Open your browser and go to yourdomain.com/install to start the installation process.
5. Follow the on-screen instructions and complete the setup.

Step 2: Enable Port 25 for Bulk Email Sending

By default, port 25 (needed for SMTP email sending) is blocked by many cloud providers. Without it, you won’t be able to send emails in bulk.

How to Enable Port 25 on Linode?

1. Contact Linode support and request port 25 unblocking.
2. If you want an instant solution, you can buy a pre-approved Linode port 25-enabled account here:
   👉 Buy Linode Port 25 Enabled Account

Step 3: Get a Valid PowerMTA License

MailWizz requires an SMTP server like PowerMTA for efficient email delivery. You need a valid PowerMTA license to run it legally.

👉 Get your PowerMTA license here: Buy Now

Step 4: Configure MailWizz with PowerMTA SMTP

Once MailWizz is installed and your server is configured with PowerMTA, follow these steps:

1. Log in to MailWizz and go to Backend > Delivery Servers.
2. Click on Create New SMTP Server.
3. Enter the following details:
   • SMTP Host: Your server’s IP (e.g., mail.yourdomain.com)
   • Port: 25 (Ensure it’s enabled)
   • Username: Your SMTP username
   • Password: Your SMTP password
4. Save the settings and test the connection.

Step 5: Set Up SPF, DKIM, and DMARC for Better Inbox Rates

To prevent emails from landing in spam, configure your SPF, DKIM, and DMARC records in your domain’s DNS settings.

• SPF Record: v=spf1 ip4:YOUR_SERVER_IP -all
• DKIM Record: Generate and add the DKIM TXT record from PowerMTA.
• DMARC Record: v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected];

Step 6: Start Sending Bulk Emails

Now that your MailWizz setup is complete, you can:
✅ Upload your email list
✅ Create and schedule campaigns
✅ Track email open rates and performance

For high deliverability, always warm up your SMTP server by gradually increasing your email volume.

Conclusion

Setting up MailWizz for bulk email sending requires a proper SMTP configuration, PowerMTA setup, and port 25 access. By using a Linode port 25-enabled account and a valid PowerMTA license, you can ensure smooth email delivery.

🚀 Get your PowerMTA License today: Buy Now
🚀 Need a Linode account with Port 25 enabled? Buy Here