If you don't want to receive messages from certain users, you can add them to the "Ignore List". This can be done via User Context Menu or in the program options dialog.

“Ignore List” can be used in two modes:

• “Hard Ignore”(unchecked) means that messages from ignored users won't be received at all.
• “Soft Ignore” (checked) means that messages from ignored users will be received, but the sound won't be played and program window won't popup.

To switch between these modes, check or uncheck the corresponding checkbox “Soft Ignore”.

You can specify the message to be sent to users in the "Ignore List" upon receiving a message from them. It is controlled by the checkbox next to the message editing field.

Attention: it is not possible to send messages to the users in Ignore List! If you try to do it, you will see an error message in brackets before the message in the message list (note that you should have "Display your own Messages" enabled to see it).

Also, it is impossible to send an empty broadcast message.