^^^That explains it; 
A pop-up msg should be helpful; Or a pop-up msg intimating that "Your inbox's full; someone's sent you a PM; clear your inbox to recieve the same!!!" or something like this;
Its a pain when we're having some important deals or trades going on and that the recipient is not aware of this;
We may have to contact them urgently for some requirement;
Sometimes even IMs doesn't seem to do the job [most of the time they're offline or that they're invisible and do not respond];
Just my 0.02$;

A pop-up msg should be helpful; Or a pop-up msg intimating that "Your inbox's full; someone's sent you a PM; clear your inbox to recieve the same!!!" or something like this;

Its a pain when we're having some important deals or trades going on and that the recipient is not aware of this;

We may have to contact them urgently for some requirement;
Sometimes even IMs doesn't seem to do the job [most of the time they're offline or that they're invisible and do not respond];
Just my 0.02$;
