Added in 1.5

/msg <nick|#channel> <message>

Sends a message to a nick or a channel.

If the message is to a nick and "Open Window on /msg" option is enabled, a private window with that nick will be opened if necessary.

Parameters

<nick|#channel> - Nick or #channel to message.
<message> - Message to send.

Example

;Send "Hello World!" to #channel
/msg #channel Hello World!

;Send "Hello World!" to Nick
/msg Nick Hello World!