sylpheed: sylpheed (lightweight and user-friendly e-mail client) sylpheed: sylpheed: Sylpheed is an e-mail client based on the GTK+ GUI toolkit. sylpheed: It runs on the X Window System, and Microsoft Windows. sylpheed: sylpheed: Sylpheed is free software distributed under the GNU GPL. sylpheed: sylpheed: Homepage: https://sylpheed.sraoss.jp/en/ sylpheed: sylpheed: sylpheed: