Sylpheed is a simple, lightweight but full-featured, and easy-to-use e-mail client (mailer, MUA).Features: • Simple, beautiful, and well-polished user interface • Comfortable operationality which is built in detail • Immediately available with minimal configuration • Lightweight operation • High reliability • Internationalization and Multilingualization support • High-level Japanese processing • Various protocols support • Security features (GnuPG, POP3/IMAP4/NNTP over SSL/TLSv1) • Powerful filtering • Junk mail control • Flexible cooperation with external commands Linux, BSD, and Mac OS X versions available.What's New in version 2.5.0: New features: • The vertical 3-paned view mode was added. • The feature to save SSL peer certificate was added. • The option 'Treat HTML only message as attachment' was added. • The feature to confirm missing attachments was added. • The feature to confirm recipients before sending was added. Feature improvements: • To: header is also searched by quick search in Sent/Draft/Queue folders. • 'Edit/Quick search' menu was added. • Spaces in address and server entries on account preferences dialog are now automatically removed when applied. • The compose window now remembers the maximized state. • The focus will not move from the text view to the summary view with 'Next/Prev' keyboard operation now. • The alert dialog is displayed now when PGP signing/encryption failed. Bugfixes: • The bug that caused busy loop when initial connection was immediately refused was fixed. • The bug that the quote description dialog never appeared again after closing it with the close button was fixed. • The new/unread status display on quick search filtered mode was fixed. • The windres command will not be enabled on non-win32 platforms now. • The address completion was fixed. • Win32: --attach option was fixed. • The sylpheed.desktop file was fixed. • A crash bug was fixed. • Content-Transfer-Encoding header with comments was supported. • UTF-8 locale strings with suffix '.utf8' were supported.