Software Alternatives, Accelerators & Startups

OpenSMTPD VS Mailosaur

Compare OpenSMTPD VS Mailosaur 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...

Mailosaur logo Mailosaur

Email Testing for QA & Development Teams.
  • OpenSMTPD Landing page
    Landing page //
    2019-03-05
  • Mailosaur Landing page
    Landing page //
    2023-09-22

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.

Mailosaur features and specs

  • Ease of Use
    Mailosaur provides a user-friendly interface that simplifies the testing and debugging of email workflows, making it accessible even for those with limited technical expertise.
  • API Integration
    Mailosaur offers robust API support, enabling seamless integration with various test automation frameworks and allowing developers to automate email testing processes.
  • Realistic Testing
    The platform allows for realistic testing environments by simulating real-world email clients and testing how emails appear and behave across different platforms.
  • Comprehensive Documentation
    Mailosaur provides extensive documentation and support resources, helping users troubleshoot issues and maximize the platform's potential efficiently.
  • Scalability
    Mailosaur can handle varying volumes of email testing, making it suitable for both small development teams and large enterprises needing extensive email testing capabilities.

Possible disadvantages of Mailosaur

  • Pricing
    Mailosaur can be expensive, especially for smaller teams or individual developers, potentially limiting its accessibility for some users.
  • Learning Curve
    Despite its user-friendly design, new users might face an initial learning curve in understanding how to fully leverage all the platform's features.
  • Limited Offline Functionality
    Mailosaur requires an internet connection for most functionalities, which could be a drawback for teams working in environments with limited connectivity.
  • Dependency on Third-Party Service
    Relying on an external service for email testing introduces dependency risks, such as service outages or changes in policy that could impact workflow.
  • Complex Setup for Advanced Features
    Implementing some of the more advanced testing capabilities may require technical expertise, making them hard to set up for less experienced users.

OpenSMTPD videos

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

Mailosaur videos

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

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Category Popularity

0-100% (relative to OpenSMTPD and Mailosaur)
SMTP Servers
100 100%
0% 0
Email
24 24%
76% 76
MTA
100 100%
0% 0
Email Testing
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 Mailosaur

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.

Mailosaur Reviews

We have no reviews of Mailosaur yet.
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Social recommendations and mentions

Based on our record, Mailosaur should be more popular than OpenSMTPD. It has been mentiond 9 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

Mailosaur mentions (9)

  • Use Fully Sites and key points
    Automate end-to-end scenarios, validate emails, and integrate with our API for seamless workflows. Https://mailosaur.com/. - Source: dev.to / 8 months ago
  • Top Email Testing Scenarios with Cypress
    When setting up email tests, you might find it helpful to add some additional functionality to Cypress through integrations like those offered by Mailosaur. Mailosaur specializes in email and SMS testing, and provides an integration for Cypress that allows you to generate and check real email addresses directly within the testing environment, which means your tests can become more automated and efficient. If you... - Source: dev.to / about 1 year ago
  • Zero to Hero: Email Automation with Cypress & Mailosaur
    Thatโ€™s where Mailosaur comes in! An awesome tool that helps test emails (and even SMS) in an automated way. Whatโ€™s even better? Thereโ€™s an official Cypress plugin that makes email testing a breeze for us, the Cypress fans. - Source: dev.to / over 1 year ago
  • MailCatcher runs a super simple SMTP server
    This is what Mailosaur[0] offers - countries available depends on tiers though due to the number operating costs and associated regulations. [0] https://mailosaur.com. - Source: Hacker News / over 1 year ago
  • MailCatcher runs a super simple SMTP server
    Open-source is good for solo and small projects, but there are commercial solutions with continuous support, etc. And other features (e.g. SMS) like Mailosaur too https://mailosaur.com/. - Source: Hacker News / over 1 year ago
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What are some alternatives?

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

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

Mailtrap - Email Delivery Platform that delivers just in time.โ€จ Great for businesses and individuals.

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

MailHog - MailHog is an email testing tool inspired by MailCatcher, but easier to install.

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

mailslurp - Email and SMS testing and development platform for software engineers and QA testers