When using multiple target with /msg, mIRC send the correct line to the server :
Privmsg target,target1, message_here
but the line won't be shown/echoed in your channel or query.Depending on if mirc should echo the line or if i shouldn't use multiple target, this is a feature suggestion or a bug, I would like to be able to see these messages.

Same as Wims.

The message should atleast be echoed in the status window mentionning that it was a multitarget message.