How to Install and Configure hMailServer for Gmail SMTP

Proper DNS records are essential for internal and external resolution, as mail systems rely heavily on DNS for email delivery to function correctly. Before installing hMailServer, it's crucial to ensure that your planned usage (i.e., IMAP only, no POP3) doesn't require additional ports that will not be used.

For a successful installation, the following ports must be allowed in your network: . The built-in database, Microsoft SQL Server Compact Edition (CE), is suitable for testing, small deployment, or personal installations. However, if you plan to use hMailServer commercially or in production, an external database is recommended instead.

It's worth noting that hMailServer can function without encryption, but it's essential to have a valid SSL certificate to encrypt email client connections. You can obtain a free SSL certificate from Let's Encrypt. Additionally, if you plan to create hMailServer email users based on Active Directory users, an SSL certificate is necessary.

For the purpose of this article, Mozilla Thunderbird will be used as the email client for accessing email accounts. To follow along with the examples, prepare some requirements beforehand. This walkthrough will guide you through installing and configuring hMailServer on a single server, setting it up as a mailbox and SMTP server.

By the end of this article, you'll have learned how to perform basic configuration tasks such as adding domains, users, SSL certificates, and using SMTP smart host for external email delivery. You don't need to choose Microsoft Exchange; instead, you can set up the free mail server called hMailServer!

In summary, installing and configuring hMailServer is a straightforward process that requires proper DNS records, allowed ports in your network, and an optional SSL certificate. With these basics covered, you'll be able to create email users, add domains, and use SMTP smart host for external email delivery.

Hmailserver gmail smtp