| Sylpheed | |
|---|---|
 | |
 Sylpheed 2.2.7 used together withXfce Mailwatch plugin | |
| Developer | Yamamoto Hiroyuki |
| Initial release | 0.1.0alpha (January 1, 2000; 25 years ago (2000-01-01)) |
| Stable release | 3.7[1]  / 31 January 2018 |
| Preview release | 3.8beta1[2] / 14 September 2022 |
| Repository | |
| Written in | C, GTK+ |
| Operating system | BSD,Linux,macOS,Unix,Windows,AmigaOS |
| Available in | English;Japanese |
| Type | E-mail client,news client |
| License | SylpheedGPL-2.0-or-later LibSylphLGPL-2.1-or-later |
| Website | sylpheed |
Sylpheed is anopen-sourcee-mail client andnews client licensed underGNU GPL-2.0-or-later with the library partLibSylph underGNU LGPL-2.1-or-later. It provides easy configuration and an abundance of features. It stores mail in theMH Message Handling System. Sylpheed runs onUnix-like systems such asLinux orBSD, and it is also usable onWindows. It usesGTK+.[3]
In 2005, Sylpheed was forked to create Sylpheed-Claws, now known asClaws Mail.[4] As of 2020, both projects continue to be developed independently.
Sylpheed is the default mail client inLubuntu,Damn Small Linux and some flavours ofPuppy Linux.[5]
Sylpheed provides support forspam filtering using eitherbogofilter or bsfilter, at the user's choice. Bsfilter is shipped with the Windows version of Sylpheed.[6]
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.[7]
Sylpheed is unable to send HTML mail. This is intentional, since the developers consider HTML mail to be harmful.[6] It is still possible to receive HTML mail using Sylpheed.
The password is stored inplaintext in the Sylpheed configuration file, which by default is only readable by "owner" and not by "group" nor "other".[8] A feature called "master password" prevents Sylpheed from holding plaintext passwords, but does not protect stored messages from other local users with administrator privilege.[9]
Sylpheed includes nativelyPGP Sign and PGP Encrypt options in the compose window (which requires however an encryption tool based on PGP already installed on the computer).[10] This function is simple to handle yet not intuitive to set up.[11]
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