General mail options are available from Tools -> Options menu.

Show grid lines - adds grid lines to Mail module to make mail list easier to read on high resolution monitors.

Send message immediately - enabling this option will send message immediately when pressing Send button within composing message dialog. Disabling this option will move message to Outbox folder first.

Default mail composing format - sets default format for new messages.

Reply to the messages using format in which they were sent - disabling this option will make replays in default mail composing format.

Check to see if EPIM is the default email program at startup - enable this option to be sure that EPIM will be always default email client.