Version: 1.11.3 (using 4.2.3 (KDE 4.2.3) "release 1", KDE:42 / openSUSE_11.1) Compiler: gcc OS: Linux (i686) release 2.6.27.21-0.1-pae When an IMAP server is down, and the host just rejects the TCP connection KMail won't show this in the error message. Instead it just mentions "Unknown error", which is a bit confusing imho.
*** This bug has been marked as a duplicate of bug 185321 ***