Sylpheed

{{About|the e-mail client|video game developed for the PC-8801|Silpheed}}

{{Infobox Software

| name = Sylpheed

| logo = Sylpheed.png

| logo size = 48px

| screenshot = Sylpheed zen.jpg

| screenshot size = 250px

| caption = Sylpheed 2.2.7 used together with Xfce Mailwatch plugin

| developer = Yamamoto Hiroyuki

| released = 0.1.0alpha ({{Start date and age|2000|1|1}})

| latest release version = {{wikidata|property|preferred|references|edit|Q2141006|P348|P548=Q2804309}}

| latest release date = {{wikidata|qualifier|preferred|single|Q2141006|P348|P548=Q2804309|P577}}

| latest preview version = {{wikidata|property|preferred|references|edit|Q2141006|P348|P548=Q51930650}}

| latest preview date = {{wikidata|qualifier|preferred|single|Q2141006|P348|P548=Q51930650|P577}}

| programming language = C, GTK+

| operating system = BSD, Linux, macOS, Unix, Windows, AmigaOS

| language = English; Japanese

| genre = E-mail client, news client

| license = Sylpheed GPL-2.0-or-later
LibSylph LGPL-2.1-or-later

| website = {{URL|sylpheed.sraoss.jp/en/}}

}}

Sylpheed is an open-source e-mail client and news client 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 systems such as Linux or BSD, and it is also usable on Windows. It uses GTK+.{{Cite web|url=https://lwn.net/Articles/149030/|title = The Sylpheed Email Client [LWN.net]}}

In 2005, Sylpheed was forked to create Sylpheed-Claws, now known as Claws Mail.[http://sourceforge.net/p/claws-mail/news/2005/01/sylpheed-claws-100-unleashed/ "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, Damn Small Linux and some flavours of Puppy Linux.[http://puppylinux.org/wikka/sylpheed "http://puppylinux.org/wikka/sylpheed"] {{Webarchive|url=https://web.archive.org/web/20151009033548/http://puppylinux.org/wikka/Sylpheed |date=2015-10-09 }}, Retrieved 19 April 2015

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.[http://sylpheeddoc.sourceforge.net/en/faq/sylpheed-faq-1.html "Chapter 1. Sylpheed FAQ - General Information"]

=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.[http://sylpheed.sraoss.jp/en/plugin.html "Sylpheed Plug-ins"]

=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 the Sylpheed configuration file, which by default is only readable by "owner" and not by "group" nor "other".{{Cite web|url=http://sylpheed.sraoss.jp/doc/manual/en/sylpheed-8.html|title = Sylpheed User's Manual: Sylpheed configuration}} A feature called "master password" prevents Sylpheed from holding plaintext passwords, but does not protect stored messages from other local users with administrator privilege.{{Cite web|url=http://sylpheed.sraoss.jp/redmine/issues/8|title=Feature #8: Master password - Sylpheed|access-date=2017-11-15|archive-date=2017-11-16|archive-url=https://web.archive.org/web/20171116023544/http://sylpheed.sraoss.jp/redmine/issues/8|url-status=dead}}

=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).{{Cite web|url=https://opensource.com/article/17/7/email-alternatives-thunderbird|title=4 lightweight email alternatives to Thunderbird}} This function is simple to handle yet not intuitive to set up.{{Cite web|url=http://www.linux-magazine.com/Online/Blogs/Off-the-Beat-Bruce-Byfield-s-Blog/Choosing-an-email-reader-for-encryption|title = Choosing an email reader for encryption » Linux Magazine}}