Cheap mail server

Here are some affordable mail server options:

1. OpenSMTPD: A free and open-source mail server that is easy to set up and configure. It's a great option for small to medium-sized businesses or personal use.
2. Postfix: Another popular open-source mail server that is widely used and highly customizable. It's a good option for those who want a high degree of control over their mail server.
3. Sendmail: A free and open-source mail server that is widely used and has been around for a long time. It's a good option for those who want a reliable and stable mail server.
4. Mail-in-a-Box: A free and open-source mail server that is designed to be easy to set up and use. It includes a web-based interface and supports multiple protocols.
5. Mailcow: A free and open-source mail server that is designed to be easy to set up and use. It includes a web-based interface and supports multiple protocols.

Cloud-based Mail Servers:

1. Zoho Mail: A cloud-based mail server that offers a free plan with 5GB of storage and supports up to 25 users. It's a good option for small businesses or personal use.
2. G Suite: A cloud-based mail server that offers a free trial and then requires a subscription. It's a good option for businesses that need a more robust mail server with advanced features.
3. Microsoft 365: A cloud-based mail server that offers a free trial and then requires a subscription. It's a good option for businesses that need a more robust mail server with advanced features.

Virtual Private Server (VPS) Mail Servers:

1. DigitalOcean: A cloud-based VPS provider that offers a free trial and then requires a subscription. It's a good option for businesses that need a more robust mail server with advanced features.
2. Linode: A cloud-based VPS provider that offers a free trial and then requires a subscription. It's a good option for businesses that need a more robust mail server with advanced features.
3. Vultr: A cloud-based VPS provider that offers a free trial and then requires a subscription. It's a good option for businesses that need a more robust mail server with advanced features.

Cost:

• OpenSMTPD: Free
• Postfix: Free
• Sendmail: Free
• Mail-in-a-Box: Free
• Mailcow: Free
• Zoho Mail: Free (5GB storage, up to 25 users)
• G Suite: $6/user/month (Basic plan)
• Microsoft 365: $5/user/month (Business plan)
• DigitalOcean: $5/month (Basic plan)
• Linode: $5/month (Basic plan)
• Vultr: $5/month (Basic plan)

Please note that these prices are subject to change and may not include additional costs such as domain registration, SSL certificates, and other services.