Version: (using KDE KDE 3.5.5) Installed from: SuSE RPMs OS: Linux When email is uploaded to the server and the inbox is checked at the same time there are two jobs to cancel. If one cancels the inbox-check, the upload is canceled too, which can lead to data-loss. See bug 140010.
bug #140010 is fixed in KDE 4.3. For me, sending and receving messages is happening independently. That means: works for me. Please report if you still experience this problem, may be I missunderstood you.