Sylpheed

Sylpheed is an open-source e-mail client and news client licensed under the GPL. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on Unix-like systems such as Linux or BSD, and it is also usable on Windows. It uses GTK+.[1]

Sylpheed
Sylpheed 2.2.7 used together with Xfce Mailwatch plugin
Developer(s)Yamamoto Hiroyuki
Initial release0.1.0alpha (January 1, 2000 (2000-01-01))
Stable release
3.7.0 (January 31, 2018 (2018-01-31)) [±]
Preview release
3.7beta1 (January 18, 2018 (2018-01-18)) [±]
Repository
Written inC, GTK+
Operating systemBSD, Linux, macOS, Unix, Windows
Available inEnglish; Japanese
TypeE-mail client, news client
LicenseGPL/LGPL
Websitesylpheed.sraoss.jp/en/

In 2005, Sylpheed was forked to create Sylpheed-Claws, now known as Claws Mail.[2] As of 2020, both projects continue to be developed independently.

Sylpheed is the default mail client in Lubuntu, Damn Small Linux and some flavours of Puppy Linux.[3]

Features

Spam filtering

Sylpheed provides support for spam filtering using either bogofilter or bsfilter, at the user's choice. Bsfilter is shipped with the Windows version of Sylpheed.[4]

Plug-ins

Sylpheed supports the development of plug-ins. As of February 2015, Sylpheed's website notes an attachment-tool plug-in, an automatic mail forwarding plug-in, and a plug-in for determining whether or not attachments are password-protected.[5]

Limitations

Sylpheed is unable to send HTML mail. This is intentional, since the developers consider HTML mail to be harmful.[4] It is still possible to receive HTML mail using Sylpheed.

Password

The password is stored in plaintext in the Sylpheed configuration file, which by default is only readable by "owner" and not by "group" nor "other".[6] A feature called "master password" prevents Sylpheed from holding plaintext passwords, but does not protect stored messages from other local users with administrator privilege.[7]

Encryption

Sylpheed includes natively PGP Sign and PGP Encrypt options in the compose window (which requires however an encryption tool based on PGP already installed on the computer).[8] This function is simple to handle yet not intuitive to set up.[9]

See also

References
  1. https://lwn.net/Articles/149030/
  2. "Sylpheed-Claws 1.0.0 unleashed!!", 18 January 2005.
  3. "http://puppylinux.org/wikka/sylpheed", Retrieved 19 April 2015
  4. "Chapter 1. Sylpheed FAQ - General Information"
  5. "Sylpheed Plug-ins"
  6. http://sylpheed.sraoss.jp/doc/manual/en/sylpheed-8.html
  7. http://sylpheed.sraoss.jp/redmine/issues/8
  8. https://opensource.com/article/17/7/email-alternatives-thunderbird
  9. http://www.linux-magazine.com/Online/Blogs/Off-the-Beat-Bruce-Byfield-s-Blog/Choosing-an-email-reader-for-encryption


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