Software Alternatives, Accelerators & Startups

OpenSMTPD VS hMail Server

Compare OpenSMTPD VS hMail Server and see what are their differences

OpenSMTPD logo OpenSMTPD

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with...

hMail Server logo hMail Server

hMailServer is a free e-mail server for Microsoft Windows.
  • OpenSMTPD Landing page
    Landing page //
    2019-03-05
  • hMail Server Landing page
    Landing page //
    2023-07-22

OpenSMTPD features and specs

  • Simplicity
    OpenSMTPD is designed to be simple and straightforward, which makes it easier to configure and manage compared to other mail transfer agents. Its configuration syntax is clean and readable.
  • Security-focused
    One of the main goals of OpenSMTPD is to provide a secure mail transfer agent. It is developed by the OpenBSD team, which is known for its emphasis on security.
  • Lightweight
    OpenSMTPD is a lightweight solution, using minimal system resources, making it suitable for systems with lower hardware capabilities or for those looking to optimize performance.
  • Integration with OpenBSD
    As a project developed by the OpenBSD team, OpenSMTPD integrates well with OpenBSD, taking advantage of the system's security features and optimizations.
  • Active Community
    OpenSMTPD has an active development community, which provides timely updates, patches, and support, helping to keep the software secure and reliable.

Possible disadvantages of OpenSMTPD

  • Feature Limitation
    Compared to more established mail servers like Postfix or Exim, OpenSMTPD may lack some advanced features or integrations that larger enterprises might require.
  • Limited Documentation
    The documentation for OpenSMTPD, while improving, is not as comprehensive as that for more widely-used MTAs, which can create a steeper learning curve for new administrators.
  • Less Third-Party Support
    Due to its lesser adoption compared to other MTAs, there might be fewer third-party tools, plugins, and resources available for extending OpenSMTPD's capabilities.
  • Platform Specific Optimization
    While its integration with OpenBSD is a strength, it may not be as optimized for other operating systems, possibly leading to a less efficient experience outside the BSD ecosystem.
  • Community-Centric Development
    Being a smaller, community-driven project, OpenSMTPD may not offer the same level of support or development resources as more commercially backed mail server solutions.

hMail Server features and specs

  • Free and Open Source
    hMailServer is completely free to use, which makes it an attractive option for small businesses and organizations with limited budgets. It also has a source code available for customization.
  • Cross-Platform Compatibility
    It is compatible with Windows operating systems, making it suitable for a variety of deployment environments, especially those already running on Windows.
  • Wide Protocol Support
    hMailServer supports various protocols like SMTP, POP3, and IMAP, which cover most of the functionalities required for email servers.
  • Built-in Anti-Spam and Anti-Virus
    The server includes robust anti-spam and anti-virus features that help in reducing unwanted emails and protecting against malicious attacks.
  • Administrator-Friendly
    It has an intuitive web-based administration interface that simplifies server management tasks, from user settings to email rules and more.

Possible disadvantages of hMail Server

  • Platform Limitation
    hMailServer is designed specifically for Windows, which limits its usability for organizations that prefer or exclusively use Unix/Linux-based systems.
  • Limited Scalability
    While adequate for small to medium-sized deployments, hMailServer may not be as scalable as some enterprise-level mail servers, potentially limiting its use for very large organizations.
  • Community Support
    Support primarily comes from the community via forums. There is no dedicated customer support team, which could be a constraint in urgent or complex troubleshooting scenarios.
  • Dependency on External Tools
    Though feature-rich, some advanced functionalities like detailed logging and backup may require additional external tools or scripts, complicating the setup.
  • Periodic Updates
    The frequency of updates and patches may not be as regular as those for commercial products, potentially leading to security vulnerabilities if the software is not monitored closely.

Analysis of hMail Server

Overall verdict

  • hMailServer is a good choice for certain use cases.

Why this product is good

  • hMailServer is a reliable and free email server for Windows that provides essential features such as support for IMAP, SMTP, and POP3. It is open-source, which allows for community-driven improvements and transparency. The server is lightweight, and it is suitable for small to medium-sized businesses or individuals looking for an adequate email server solution without high resource demands. Additionally, it has built-in anti-spam features, integration with ClamWin or other anti-virus software, and a flexible scripting interface using VBScript.

Recommended for

    hMailServer is recommended for small to medium-sized businesses, tech-savvy individuals, or developers who are looking for an easy-to-manage, open-source email server solution on Windows. It's ideal for users who need a simple setup without the complexity and cost associated with larger, enterprise-level servers.

OpenSMTPD videos

DAY[0] Episode #31 - kr00k, GhostCat, and more issues from NordVPN, Samsung, OpenSMTPd

hMail Server videos

No hMail Server videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to OpenSMTPD and hMail Server)
SMTP Servers
50 50%
50% 50
Email
30 30%
70% 70
MTA
100 100%
0% 0
Self-hosted Email
0 0%
100% 100

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare OpenSMTPD and hMail Server

OpenSMTPD Reviews

Best Free and Open Source Alternatives to Microsoft Exchange Server
OpenSMTPD is an implementation of the server-side SMTP protocol, with some additional standard extensions. Its design goals include security, reliability, ease of configuration, and support for common use cases.

hMail Server Reviews

We have no reviews of hMail Server yet.
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Social recommendations and mentions

Based on our record, OpenSMTPD seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

OpenSMTPD mentions (2)

  • Has anyone setup a Linux based internal only smtp relay?
    I've had something of the same experience with Postfix, u/0x29aNull. Check out OpenSMTPD. It is lightweight and standards compliant. I know that there are packages for Debian and Alpine Linux. There may also be ones for Fedora/RHEL derivatives. I use it in my environment on OpenBSD. Source: over 3 years ago
  • DKIM Migration: Rpamd instead of DKIMproxy out on OpenBSD / OpenSMTPD
    When I installed Rspamd with on OpenBSD / OpenSMTPD the other day, DKIMProxy out (dkimproxy_out daemon), which had been got via OpenBSD Ports package system, was used to add DKIM signatures to mails in order to improve security on emails. - Source: dev.to / about 5 years ago

hMail Server mentions (0)

We have not tracked any mentions of hMail Server yet. Tracking of hMail Server recommendations started around Mar 2021.

What are some alternatives?

When comparing OpenSMTPD and hMail Server, you can also consider the following products

Postfix - Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).

Exim - Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

mailcow - An open source mailserver suite.

Sendmail - Sendmail is a general purpose internetwork email routing facility that supports many kinds of...

Axigen - Axigen is an integrated email, calendaring & collaboration platform, built on a Linux mail server technology.