Sylpheed is an

open-source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use and view the source code, design documents, or content of the product. The open source model is a decentrali ...

e-mail client An email client, email reader or, more formally, message user agent (MUA) or mail user agent is a computer program used to access and manage a user's email. A web app, web application which provides message management, composition, and receptio ...

and

news client A newsreader is a software application that reads articles on Usenet distributed throughout newsgroups. Newsreaders act as clients which connect to a news server, via the Network News Transfer Protocol (NNTP), to download articles and post new ...

licensed under GNU GPL-2.0-or-later with the library part ''LibSylph'' under GNU LGPL-2.1-or-later. It provides easy configuration and an abundance of features. It stores mail in the MH Message Handling System. Sylpheed runs on

Unix-like A Unix-like (sometimes referred to as UN*X, *nix or *NIX) operating system is one that behaves in a manner similar to a Unix system, although not necessarily conforming to or being certified to any version of the Single UNIX Specification. A Uni ...

systems such as

Linux Linux ( ) is a family of open source Unix-like operating systems based on the Linux kernel, an kernel (operating system), operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically package manager, pac ...

BSD The Berkeley Software Distribution (BSD), also known as Berkeley Unix or BSD Unix, is a discontinued Unix operating system developed and distributed by the Computer Systems Research Group (CSRG) at the University of California, Berkeley, beginni ...

, and it is also usable on

Windows Windows is a Product lining, product line of Proprietary software, proprietary graphical user interface, graphical operating systems developed and marketed by Microsoft. It is grouped into families and subfamilies that cater to particular sec ...

. It uses

GTK+ GTK (formerly GIMP ToolKit and GTK+) is a free software cross-platform widget toolkit for creating graphical user interfaces (GUIs). It is licensed under the terms of the GNU Lesser General Public License, allowing both free and proprietary s ...

. In 2005, Sylpheed was forked to create Sylpheed-Claws, now known as

Claws Mail Claws Mail is a free and open-source, C_(programming_language), C/GTK-based e-mail client, which is both lightweight and highly configurable. Claws Mail runs on both Microsoft Windows, Windows and Unix-like systems such as Linux, BSD, and Solaris ...

."Sylpheed-Claws 1.0.0 unleashed!!"
18 January 2005. As of 2020, both projects continue to be developed independently. Sylpheed is the default mail client in

Lubuntu Lubuntu ( ) is a lightweight Linux distribution based on Ubuntu that uses the LXQt desktop environment in place of GNOME. Lubuntu was originally touted as being "lighter, less resource hungry and more energy-efficient", but now aims to be "a f ...

, Damn Small Linux and some flavours of

Puppy Linux Puppy Linux is a family of light-weight Linux distributions that focus on ease of use and minimal memory footprint. The entire system can be run from random-access memory (RAM) with current versions generally taking up about 600 MB (64-bit), 3 ...

Features

Spam filtering

Sylpheed provides support for

spam filtering Spam most often refers to: * Spam (food), a consumer brand product of canned processed pork of the Hormel Foods Corporation * Spamming, unsolicited or undesired electronic messages ** Email spam, unsolicited, undesired, or illegal email messages ...

using either bogofilter or bsfilter, at the user's choice. Bsfilter is shipped with the Windows version of Sylpheed."Chapter 1. Sylpheed FAQ - General Information"
/ref>

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.
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Limitations

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

Password

The password is stored in

plaintext In cryptography, plaintext usually means unencrypted information pending input into cryptographic algorithms, usually encryption algorithms. This usually refers to data that is transmitted or stored unencrypted. Overview With the advent of comp ...

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

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). This function is simple to handle yet not intuitive to set up.

References

External links

*
Sylpheed documentation project
Free software programmed in C Email clients that use GTK GNOME Applications Free email software Email client software for Linux Windows email clients MacOS email clients Usenet clients {{network-software-stub