Schleuder
Schleuder: A self-hosted list gateway for groups that need OpenPGP message handling. Ranked #16 of 21 in Mailing List Management Software by our editors (7.0/10); pricing: Open source; best for lists where OpenPGP email security is essential.
At a glance
- Editor score7.0 / 10
- PricingOpen source
- Best forLists where OpenPGP email security is essential
- Paid fromNone
- List modesBoth
- Facts checked5 Oct 2026
Where it wins
- Decrypts and verifies OpenPGP mail before distribution
- Manages subscriber and list keys, including through email commands
- Supports Postfix and Exim, with web and command-line administration
Where it doesn't
- Requires groups to operate their own mail infrastructure
- No signup forms for list growth
- No server-side message archives
Our verdict on Schleuder
Groups that need mailing lists to handle OpenPGP mail may find Schleuder a focused fit. It is an email gateway that decrypts and verifies incoming messages, then distributes them to subscribers, including encrypted copies. Administrators can manage lists through a web interface or command-line tools, while subscribers can use email commands to subscribe, unsubscribe, and manage keys. It is aimed at server administrators and groups running their own mail infrastructure, rather than teams looking for a hosted email-marketing service.
OpenPGP handling shapes the product more than campaign tools do. Schleuder manages subscriber and list keys, verifies signatures, and lets administrators configure which headers list messages carry. It can also accept messages from non-subscribers and resend messages to non-subscribers. That remailing behavior broadens how a list can distribute mail, but the central value remains encrypted group communication. Postfix and Exim integration connects it to those mail transport agents, making it relevant to groups already operating either one.
The trade-off is its infrastructure focus. Teams need to manage the mail environment themselves, and Schleuder does not provide signup forms or server-side message archives. Those limits make it a poor match for organizations seeking a general-purpose marketing platform with audience acquisition and a searchable campaign history. Choose it when OpenPGP processing, key management, and control over list delivery matter more than those conveniences; choose another tool if you want a hosted service or built-in list-growth and archive features.
Schleuder pricing
Schleuder fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | None |
| List modes | Both |
| Moderation controls | Not verified |
| Subscriber preferences | Yes |
| Self-hosted option | Yes |
| Message archives | No |
| Signup forms | No |
| Deployment | Self-hosted, Cloud |
| Platforms | Linux, Web |
| Support | Email, Community, Docs |
| Built for | Small business, Mid-market (editorial estimate) |
| Integrations | 2 integrations: Postfix, Exim |
| Pricing | Open source |
| Website | schleuder.org |
| Facts checked | 5 Oct 2026 |
Schleuder integrations
Schleuder lists 2 integrations on its own site.
- Postfix
- Exim
Alternatives to Schleuder
- phpListA flexible campaign tool with segmentation, A/B tests, and both hosted and self-hosted options.8.9
- listmonkA free, self-hosted mailing list manager with campaign tools, analytics, and API messaging.8.8
- GNU MailmanA free, open-source list manager for moderated discussion and announcement email.8.7
See all Schleuder alternatives →
Used Schleuder? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Schleuder for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Schleuder is listed in our Mailing List Management Software directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/schleuder/"><img src="https://www.itechguides.com/best/badge/schleuder.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.
Last updated · How we research and update