Mailspring is a Powerful New Open Source Email App

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Mailspring is a new free, open-source mail client for Windows, macOS and Linux.

It’s a fork of the Nylas mail client but with a native C++ sync engine, fewer dependencies, and vastly improved performance.

Earlier this year we shared word that Nylas Mail is dead. The company behind the app state they are “sunsetting further development of the product”.

Nylas was a breath of fresh air amongst the somewhat-stale stalwarts of the open-source mail client scene. And while the Electron-based app wasn’t the most resource efficient of apps it did bring some new features and a striking design to the table.

But you don’t need to miss; Mailspring is the perfect Nylas mail alternative.

Mailspring E-Mail Client

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Mailspring is a Nylas fork created by one of the apps original developers. It’s said to be ‘faster’ and ‘leaner’ than the version its based.

‘The JavaScript sync engine has been replaced by native C++ core’

Mailspring keeps many of the useful features that made Nylas Mail popular, but improves the foundation they sit on.

How is Mailspring better than Nylas?

Although Mailspring is a fork of Nylas Mail (known as Nylas N1 back when it used a cloud-based sync engine)

The developers behind Mailspring have rewritten core parts of the app to be leaner, and more efficient.

The (resource heavy) JavaScript sync engine that slowed Nylas mail down has been replaced by new, native C++ core (just like those used in macOS e-mail apps Sparrow and Airmail).

The new native core means Mailspring uses around 50% less RAM than Nylas and is able to sync your email faster.

And that interminable delay between opening the app and the window appearing?


If you always liked the look of Nylas N1, but were put off by its use of a remote server to sync your mail; or if you tried its less connected successor, Nylas Mail, only to find it too heavy for your system or battery, I really recommend you give the new fork a spin.

Mailspring features

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You can use Nylas themes in Mailspring

You can set-up multiple accounts, including IMAP (Gmail, Yahoo! Mail, etc) and Office 365/Outlook accounts.

You can brows mail from all your accounts using a unified inbox, and quickly find any mail using the built-in search.

Other mail features are also included, such as read receipts, link tracking, ‘enriched contacts’ and quick reply templates.

Nylas mail themes work out of the box with Mailspring too — perfect if you want the client to look a little more ‘Ubuntu-y’.

Pro Accounts Support Development

Naturally there has to be some angle in this to help fund development the client going forward. And to that end paid “pro” accounts remain on offer.

But here’s the really great bit: just one thousand paid subscriptions would make >Mailspring a stable business and help ensure its continued development.

There’s currently no word on when pro accounts will be available, or how much they’ll cost.

Download Mailspring

Mailspring pulled the Linux download shortly after this article was written.

You can download Mailspring 1.0 for Windows, macOS and Linux from the project website. The source code is hosted on Github.

At the time of writing the Linux link isn’t working due to a typo, so use the link below to grab it:

Download Mailspring for Ubuntu (64-bit)