#1
✉️ Composable all-in-one mail server.
6.0K starsMay 26, 2026 pushproductivity-automationGoEmail
$ npx skills add foxcpp/maddyAlternatives
Mailu alternatives for AI agents.
Compare similar skills by workflow fit, trust score, quality, GitHub adoption, maintenance, and install readiness.
Current skill
Mailu
Insular email distribution - mail server as Docker images
100
Quality
89
Trust
7.3K
Stars
#2
A cross-platform .NET library for IMAP, POP3, and SMTP.
6.8K starsJun 12, 2026 pushproductivity-automationC#Email
$ npx skills add jstedfast/MailKit#3
Simple API, Complex Emails (Jakarta Mail smtp wrapper)
1.3K starsJun 5, 2026 pushproductivity-automationJavaEmail
$ npx skills add bbottema/simple-java-mail#4
:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.
18K starsJun 15, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add Foundry376/Mailspring#5
An IMAP/POP/SMTP proxy that transparently adds OAuth 2.0 authentication for email clients that don't support this method. Keep legacy email clients working with Exchange Online, Gmail and other providers.
1.4K starsApr 21, 2026 pushproductivity-automationPythonEmail
$ npx skills add simonrob/email-oauth2-proxy#6
Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.
15K starsMay 24, 2026 pushproductivity-automationPythonEmail
$ npx skills add mail-in-a-box/mailinabox#7
CLI to manage emails
6.4K starsJun 12, 2026 pushproductivity-automationRustEmail
$ npx skills add pimalaya/himalaya#8
Low code web framework for real world applications, in Python and Javascript
10K starsJun 16, 2026 pushproductivity-automationPythonEmail
$ npx skills add frappe/frappe#9
✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat
3.7K starsJun 15, 2026 pushproductivity-automationCEmail
$ npx skills add neomutt/neomutt#10
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
2.0K starsJun 15, 2026 pushproductivity-automationC#Email
$ npx skills add jstedfast/MimeKit#11
The SimpleLogin back-end and web app
6.7K starsJun 12, 2026 pushproductivity-automationPythonEmail
$ npx skills add simple-login/app#12
Bichon – A lightweight, high-performance Rust email archiver with WebUI
1.8K starsJun 11, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add rustmailer/bichon#13
Decentralized private messenger with chat-shared tools and games for Desktop
1.5K starsJun 16, 2026 pushproductivity-automationTypeScriptEmail
$ npx skills add deltachat/deltachat-desktop#14
a list of disposable email domains
5.1K starsJun 16, 2026 pushproductivity-automationPythonEmail
$ npx skills add disposable-email-domains/disposable-email-domains#15
Mail hosting made simple
3.5K starsJun 15, 2026 pushproductivity-automationPythonEmail
$ npx skills add modoboa/modoboa#16
Work with email by IMAP
830 starsMay 13, 2026 pushproductivity-automationPythonEmail
$ npx skills add ikvk/imap_toolsHow to choose
When should you switch?
Use an alternative when it has a clearer install path, higher trust score, fresher maintenance, or better platform fit for your current agent stack. Keep Mailu if it already passes your workflow test and repository review.
Next step
Compare top candidates side by side
Open the compare page, test the install commands in a sandbox, and check each repository before using a skill in production.