Comment 15 for bug 295266

After some testing using KDE 4.3 in Kubuntu karmic I can now confirm that Malte's fix works also for kmail. In fact, all kio slaves (like kio_http, kio_smtp) that use the KTcpSocket class correctly support with this fix self-signed certificates.

Kmail correctly uses the certification list that is connected by the symbolic link fix. See extract of the debug log:

kmail(20529) KMComposeWin::doSend: Plain text
kmail(20529) KMComposeWin::doSend: Calling applyChanges()
kmail(20529) KMComposeWin::applyChanges: Entering
kmail(20529) MessageComposer::applyChanges: KMAIL_DEBUG_COMPOSER_CRYPTO = FALSE
kmail(20529) MessageComposer::breakLinesAndApplyCodec: Added an <LF> on the last line
kmail(20529) MessageComposer::breakLinesAndApplyCodec: Added an <LF> on the last line
kmail(20529) MessageComposer::composeMessage: Starting to compose message
kmail(20529) MessageComposer::composeMessage: mEarlyAddAttachments= false mAllAttachmentsAreInBody= false
kmail(20529) MessageComposer::addBodyAndAttachments: Set top level Content-Type from originalContentTypeStr()= "Text/Plain;
  charset="us-ascii""
kmail(20529) KMComposeWin::slotContinueDoSend: true
kmail(20529) KMFolderMaildir::addMsgInternal: FolderStorage::msgStatusChanged
kmail(20529)/kmail (storage internals) KMFolderMaildir::getDwString: KDE_fopen(abs_file= "/home/solkraftwerk/.kde/share/apps/kmail/mail/outbox/cur/1264549308.20529.6aSVn" , "r") == stream == 0x289af80
kmail(20529)/kmail (storage internals) KMFolderMaildir::getDwString: fclose(mIndexStream = 0x289af80 )
kmail(20529)/kdepimlibs (mailtransport) MailTransport::Transport::Transport: "1254495839"
kmail(20529)/kio (Slave) KIO::Slave::createSlave: createSlave "smtp" for KUrl("smtp://<email address hidden>:25/send?headers=0&<email address hidden>&<email address hidden>&hostname=Mark-Aurel.gas.de&size=426")
kmail(20529)/kio (KIOConnection) KIO::ConnectionServer::listenForRemote: Listening on "local:/tmp/ksocket-solkraftwerk/kmailw20529.slave-socket"
klauncher(13962)/kio (KLauncher) KLauncher::requestSlave: KLauncher: launching new slave "kio_smtp" with protocol= "smtp" args= ("smtp", "local:/tmp/ksocket-solkraftwerk/klauncherT13962.slave-socket", "local:/tmp/ksocket-solkraftwerk/kmailw20529.slave-socket")

klauncher(13962)/kio (KLauncher) KLauncher::processRequestReturn: "kio_smtp" (pid 20570) up and running.
kmail(20529)/kdepimlibs (mailtransport) MailTransport::SmtpJob::startSmtpJob: Created new SMTP slave 0x28a4ae0
kmail(20529) KMComposeWin::cleanupAutoSave: deleting autosave file "1264549295.20529.CDuGd"
kmail(20529) KMFolderMaildir::removeFile: Can't delete "/home/solkraftwerk/.kde/share/apps/kmail/autosave/new/1264549295.20529.CDuGd" "No such file or directory"
kio_smtp(20570)/kio (TCPSlaveBase) KIO::TCPSlaveBase::disconnectFromHost:
<b>kio_smtp(20570)/kssl KSslCertificateManagerPrivate::loadDefaultCaCertificates: Loading 155 CA certificates from ("/usr/share/kde4/apps/kssl/ca-bundle.crt") </b>
kio_smtp(20570)/kssl KTcpSocket::showSslErrors: "The host name did not match any of the valid hosts for this certificate"
kio_smtp(20570)/kssl KIO::TCPSlaveBase::startTLSInternal: Cipher info - advertised SSL protocol version 8 negotiated SSL protocol version 8 authenticationMethod: "RSA" encryptionMethod: "AES" keyExchangeMethod: "DH" name: "DHE-RSA-AES256-SHA" supportedBits: 256 usedBits: 256
kio_smtp(20570)/kio (kioslave) KIO::SlaveBase::canResume: offset= "0"
kmail(20529) KMSender::cleanup:
kmail(20529)/kmail (storage internals) KMFolderMaildir::reallyDoClose: fclose(mIndexStream = 0x28aba30 )
kmail(20529)/kmail (storage internals) KMFolderMaildir::reallyDoClose: fclose(mIndexStream = 0x2142120 )
kmail(20529)/kdepimlibs (mailtransport) MailTransport::SmtpJob::~SmtpJob: clearing SMTP slave pool 1
kio_smtp(20570)/kio (TCPSlaveBase) KIO::TCPSlaveBase::disconnectFromHost:
kmail(20529)/kmail (storage internals) KMFolderMaildir::reallyDoClose: fclose(mIndexStream = 0x1d5fff0 )
kmail(20529) KMail::Vacation::~Vacation: ~Vacation()
kmail(20529)/kmail (storage internals) KMFolderMaildir::reallyDoClose: fclose(mIndexStream = 0x144bb20 )
kmail(20529)/kmail (storage internals) KMFolderMaildir::reallyDoClose: fclose(mIndexStream = 0x14276f0 )
kmail(20529) KMKernel::~KMKernel:
kio_http(20558)/kio (TCPSlaveBase) KIO::TCPSlaveBase::disconnectFromHost:
kio_http(20558)/kio (TCPSlaveBase) KIO::TCPSlaveBase::disconnectFromHost:
kio_http(20559)/kio (TCPSlaveBase) KIO::TCPSlaveBase::disconnectFromHost:
kio_http(20559)/kio (TCPSlaveBase) KIO::TCPSlaveBase::disconnectFromHost:
kio_http(20559)/kio (TCPSlaveBase) KIO::TCPSlaveBase::disconnectFromHost:
kio_http(20558)/kio (TCPSlaveBase) KIO::TCPSlaveBase::disconnectFromHost: