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Top 23 Mail Open-Source Projects
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Mailspring
:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.
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InfluxDB
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docker-mailserver
Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.
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Mail-in-a-Box
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.
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WorkOS
The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
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FluentEmail
All in one email sender for .NET. Supports popular senders (SendGrid, MailGun, etc) and Razor templates.
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free-email-forwarding
The best free email forwarding for custom domains. Visit our website to get started (SMTP server)
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MimeKit
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
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inbucket
Disposable webmail server (similar to Mailinator) with built in SMTP, POP3, RESTful servers; no DB required.
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SaaSHub
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I fully agree, moreover this:
> Rolling release distributions like OpenSUSE Tumbleweed follow upstream much more closely while still maintaining stability through thorough automated testing
Shows the author hasn't used Tumbleweed for any reasonable amount of time himself[0][1][2]. I daily drove it for a short while before moving to Fedora.
0: https://github.com/Foundry376/Mailspring/issues/533
1: https://forums.opensuse.org/t/tumbleweed-breaks-after-update...
2: https://www.reddit.com/r/openSUSE/comments/v09hnc/tumbleweed...
Project mention: Postal: Open-source mail delivery platform for incoming and outgoing email | news.ycombinator.com | 2024-03-13
I can recommend Docker mailserver (it also works with Podman). It is already pretty lightweight but you can even make it lighter and it has an active community as well as regular updates.
Project mention: Mail-in-a-Box – Take back control of your email | news.ycombinator.com | 2024-02-24
I've been running mailcow [1] on a Hetzner cloud server for a few years and am pretty happy with it.
[1] https://mailcow.email
Project mention: Preview emails with letter_opener, MailCatcher and MailHog | news.ycombinator.com | 2023-08-13hey HN, I recently published an article going deep into email previewing (in Ruby on Rails, but I think it's relevant beyond Rails).
MailCatcher (https://github.com/sj26/mailcatcher) and MailHog (https://github.com/mailhog/MailHog) are super handy and easy to run locally. Both spin up an SMTP server which you can direct mail to, and give you a nice web interface to browse mail and preview it.
Happy to answer any question! thanks, harrison
Third, Send-MailMessage has been deprecated. Try MailKit instead. To be honest, though, I'm yet to find time and test it myself.
Project mention: Roundcube and docker-mailserver (Docker Mailserver) on the same VPS | /r/selfhosted | 2023-12-06Consider installing Mailu instead, which is a single Docker container with a full mail server and Roundcube on top. Very easy to install.
Project mention: Stalwart mail server (self-hosted all-in-one mail server) now as an admin webui | news.ycombinator.com | 2024-04-09It's interesting how there is now
* Maddy: https://github.com/foxcpp/maddy
* Mox: https://github.com/mjl-/mox
* and Stalwart
which all see to aim for more or less the same niche. I wonder if we'll see two of those merge eventually.
Project mention: Show HN: Inbox Zero – open-source email assistant | news.ycombinator.com | 2023-12-29https://github.com/neomutt/neomutt is a mature project with similar functionality in its arsenal via tagging and vim bindings, not limited to gmail either. You can also write emails in vim/$EDITOR fluidly.
Project mention: Happy 20th Anniversary, Gmail. I'm Sorry I'm Leaving You | news.ycombinator.com | 2024-04-15* [1] should be https://stalw.art
It's a neat project though, that I hadn't heard of before. I have ran Postfix to do domain-wide email forwarding (to Gmail coincidentally) but going the other way around and having the end destination be self hosted is on my to-do list.
Project mention: Sending HTML based emails. Is there an easier way to dynamically generate the document? | /r/csharp | 2023-05-15Surprised no one has mentioned this- https://github.com/lukencode/FluentEmail
Have you seen our service yet? You might not have since we don't focus on ads/marketing too much; we've been dedicated to high-quality product efforts.
Our service is called Forward Email (https://forwardemail.net) and it's so easy to use we use it ourselves (dogfood style).
Although we don't have mail clients yet, we fully support Thunderbird and any other email client (e.g. K-9 Mail, FairEmail, Apple Mail, Outlook, Gmail, etc).
Our FAQ is extensive at https://forwardemail.net/faq and we walk you through set up, which is tailored to you based off your specific registrar/DNS provider. We also have instructions for SPF/DMARC/DKIM and more, so that you land in the inbox.
Lastly, unlike everyone else, we're actually 100% open-source on GitHub at https://github.com/forwardemail
For designing signatures outside Exchange/Outlook, I would stick to the great compatibility overview provided by Campaign Monitor, and additionaly use tools such as PreMailer.
Project mention: How to get CardBook in Thunderbird to sync contacts with CardDAV or other type of connection? | /r/ProtonMail | 2023-04-27
Yeah thanks for this, I’ve been using it for years! Recently switched to mailslurper:
https://github.com/mailslurper/mailslurper
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Mail related posts
- Goodbye SSH: Discover Stalwart's Web-Based Admin Interface
- Apache SpamAssassin 4.0.1 has been released
- Postal: Open-source mail delivery platform for incoming and outgoing email
- Mail-in-a-Box – Take back control of your email
- Show HN: Swift Mail, a native macOS app for JMAP mail
- Ask HN: Self Hosting an Email Server?
- Google will disable all but OAuth for IMAP, SMTP and POP starting Sept. 30
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A note from our sponsor - InfluxDB
www.influxdata.com | 24 Apr 2024
Index
What are some of the best open-source Mail projects? This list will help you:
| Project | Stars | |
|---|---|---|
| 1 | Mailspring | 15,076 |
| 2 | Postal | 14,116 |
| 3 | docker-mailserver | 13,292 |
| 4 | Mail-in-a-Box | 13,278 |
| 5 | Mailcow | 7,931 |
| 6 | MailCatcher | 6,181 |
| 7 | MailKit | 5,924 |
| 8 | Mailu | 5,419 |
| 9 | maddy | 4,650 |
| 10 | RainLoop | 4,055 |
| 11 | neomutt | 3,062 |
| 12 | mail-server | 3,043 |
| 13 | FluentEmail | 2,895 |
| 14 | himalaya | 2,842 |
| 15 | SPStorkController | 2,712 |
| 16 | free-email-forwarding | 2,396 |
| 17 | premailer | 2,319 |
| 18 | go-imap | 1,986 |
| 19 | MimeKit | 1,748 |
| 20 | go-smtp | 1,571 |
| 21 | inbucket | 1,548 |
| 22 | hydroxide | 1,430 |
| 23 | mailslurper | 1,372 |
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