I am looking for a really fast email client.

What I expect should be similar to Sumatra PDF, foobar2000 or MPC-HC. All of these are really amazing, they are super quick and have a clean interface.

Could you recommend me an open source email application for Windows which is similar? Portable at best.

  • For Microsoft Windows? /// Do you have tested any portable email clients yet?
    – unor
    Jul 28, 2014 at 12:28
  • 1
    Yes, for Windows. In the past I always used the Gmail website to check my emails but I would like to switch to a real application so I can manage multiple accounts at the same time. If not portable it should be at least ultra lightweight.
    – user6729
    Jul 28, 2014 at 12:34
  • Why not use Thunderbird?
    – Mr. Alien
    Jul 28, 2014 at 12:48
  • I used this a few years ago and it seemed too overloaded for me. Way too many functions I will never need. Interface isn't as clear as the applications I mentioned in the question. Look how perfectly clean Sumatra looks like: i.imgur.com/BfoYnc5.jpg just features you really need. Same with foobar here: i.imgur.com/cehEvPc.jpg and both are really really fast.
    – user6729
    Jul 28, 2014 at 13:27
  • I gave it a chance and it is better as expected but still not perfect. It just doesn't feel as native as the other apps do. For example when I resize the window I feel how it stutters and isn't able to resize smooth
    – user6729
    Jul 28, 2014 at 14:37

1 Answer 1


i would suggest Claws Mail, a fork of Sylpheed.

but maybe also Sylpheed (with less features) fit your needs better, because here i found instructions for portable use.

Sylpheed is a lightweight and cross-platform email client

  • It runs on Windows
  • Clean but featureful interface
  • Open source (GPL/LGPL license)
  • Portable version available (just download the zip archive, extract, and run). A older PortableApps version is also available here.
  • I was typing a similar answer when I saw yours, so I just edited mine into this one. I hope you don't mind :)
    – Tymric
    Dec 3, 2014 at 23:41

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