Some of my friends use MSN Messenger or Windows Live Messenger. Now I am aware of a variety of clients for OSX but I haven't been able to find one with the following abilities:
- accept / receive file transfers
- receive and send messages from contacts who are invisible (appear offline)
On Adium, when an invisible contact messages me, the message is sent successfully but never arrives on my end.
edit: I also tried aMSN unsuccessfully. Also I'm not sure if sending messages to contacts that appear offline is classified as offline messsages?