An electronic mailing list offers the ability to efficiently distribute information to many internet users. It is similar in some ways to a traditional mailing list.
Electronic mailing lists are normally automated using dedicated mailing software and a reflector address. Mailing lists are often used as a two-way method of discussion between interested parties, or a one-way dissemination of information where only selected individuals can make posts.
Mailing lists provide a popular method of information exchange for both Linux developers and users. For example, the Linux kernel mailing list gets a high volume of traffic, acting as a focal point for sharing patches, discussing implementation details, reporting bugs, and new features. Many prominent companies participate in these discussions including Intel, IBM, Oracle, and VMware.
Mailing list software enables users to manage electronic mail discussion and e-newsletter lists. There is a good range of mature open source mailing list software available for the Linux platform.
Spammers unfortunately try to obtain the lists of subscribers to mailing lists. Good mailing list software seeks to thwart the spammers’ activities. Mailing lists can accept email from non-subscribers. To prevent spam being posted to subscribers, mailing list servers employ layers of spam blocking and filtering.
To provide an insight into the quality of software that is available, we have compiled a list of 14 valuable open source mailing list managers. All of these tools are released under a freely distributable license. Here’s our verdict.

Let’s explore the 14 mailing list managers at hand. For each application we have compiled its own portal page, a full description with an in-depth analysis of its features, together with links to relevant resources.
| Mailing List Managers | |
|---|---|
| listmonk | Self-hosted newsletter and mailing list manager |
| Sympa | Scalable and highly customizable modern mailing list manager |
| Mailman | Manage electronic mail discussion and e-newsletter lists. Python-based |
| Discourse | Capable mailing list, and long-form chat room |
| Mlmmj | Simple and slim mailing list manager (MLM) inspired by ezmlm |
| Keila | Send out newsletter campaigns and create sign-up forms |
| schleuder | Group’s email-gateway |
| ezmlm-idx | Highly automated mailing list manager |
| Dada Mail | Mature and intuitive web-based e-mail list management system |
| Majordomo | Perl based mailing list manager |
| phpList | Manage mailing lists and send targeted email newsletters |
| ulist | Mailing list service that keeps it simple |
| Gray Duck Mail | Modern group email discussion lists |
| OpenEMM | Automate email campaigns with scheduling, tracking, and detailed reporting |
This article has been updated to reflect the changes outlined in our recent announcement.
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What about Keila? It’s quite good for newsletters.