Version: 1.10.0 (using KDE 4.0.83)
Installed from: Compiled From Sources
Checking more than one pop3-account simultaneously (by pressing "Check Mail") fails for me at the third account with the message
"Could not connect to host pop.gmx.net: Unknown error." (for example)
All following accounts then fail with the same message.
When I check the accounts separately everything works fine.
In detail there are ten accounts to bechecked, all over POP3 using TLS.
I don't know which information you need additionally, so please ask :)
*** This bug has been marked as a duplicate of 151852 ***
Reopening, to mark it as duplicate of bug 162600 instead.
*** This bug has been marked as a duplicate of 162600 ***