TkRat is a graphical Mail User Agent (MUA) which handles MIME. It is mainly written in C but the user interface is done in tcl/tk. The following is a non exhaustive list of the capabilities: * Supports disconnected IMAP folders A disconnected mailbox is one where TkRat keeps a local copy of each message in the mailbox. The user can then work against this copy offline. Reply to messages, copy messages or delete them. At some later time the user may synchronize the mailboxes and the changes done to the local copy are applied to the master IMAP-folder. * Keeps track of number of unread messages in multiple folders One can instruct TkRat to monitor certain folders and always show the number of new/total number of messages in them. TkRat can also alert the user of new messages arriving. * Multi-lingual interface Currently English, Swedish, Italian, French and Serbian are supported but it is not hard to add more languages. * Message database Messages can be stored in a database. When inserting you add keywords, expiration time and what to do when the expiration time is reached. Internally the messages are stored as flat text-files. * Virtual folders A virtual folder is a name that has been set on an ordinary folder (mbox, mh, IMAP or POP) or a database search expression. The user can define a menu structure which holds all the virtual folders and can then move messages to a folder or open a folder via the menu. * Message hold You can suspend the composing of a message by putting the message in the hold. The composing can then be continued at a later time. You can stop the program in the meantime. Multiple messages can be in the hold at the same time. * Watcher TkRat can be configured to monitor a number of mailboxes and notify the user when new messages arrives in them. If a new message arrives a small window with a list of all messages (or only the new ones) in the mailbox is opened. The user can then either press the right mouse button in this window to make it go away and continue watching for new messages. Or press the left button to make the watcher window go away and the main window to deiconify. * Interface to the rest of the mail world The program currently understands unix mailboxes, POP, IMAP and mh folders. Messages are sent via SMTP or any user configured program (for example sendmail). * Supports Delivery Status Notifications TkRat supports the DSN standard. This lets you see if your message has arrived safely at the destination. This requires an MTA that handles the DSN ESMTP extension. * Composing Messages are composed with the built in editor (tk's text widget plus many extensions) or an external editor of your choice. * MIME support Understands MIME both in bodies and headers. * Supports PGP/MIME Generates PGP/MIME messages. There is also support for receiving old style PGP messages. /MaF