Cannot send mail to member of course if title has (

Cannot send e-mail: javax.mail.internet.AddressException: Missing ')' in string ``Wiemann - The Phonetics and Phonology of Accents of the British Isles (Wednesday 10-12:;''
 at position 88
 at javax.mail.internet.InternetAddress.parse(InternetAddress.java:808)
 at javax.mail.internet.InternetAddress.parse(InternetAddress.java:728)
 at javax.mail.internet.InternetAddress.parse(InternetAddress.java:705)
 at org.olat.core.util.mail.manager.MailManagerImpl.appendRecipients(MailManagerImpl.java:1224)
 at org.olat.core.util.mail.manager.MailManagerImpl.saveDBMessage(MailManagerImpl.java:1083) 
 at org.olat.core.util.mail.manager.MailManagerImpl.sendMessage(MailManagerImpl.java:712)
 at org.olat.modules.co.ContactFormController.doSend(ContactFormController.java:269)
 at org.olat.modules.co.ContactFormController.event(ContactFormController.java:233)
 at org.olat.core.gui.control.DefaultController$1.run(DefaultController.java:250)
 at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
 at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:247)
 at org.olat.core.gui.control.DefaultController.fireEvent(DefaultController.java:194)
 at org.olat.modules.co.ContactForm.formOK(ContactForm.java:303)
 at org.olat.core.gui.components.form.flexible.impl.FormBasicController.event(FormBasicController.java:389)
 at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:206)
 at org.olat.core.gui.components.AbstractComponent$1.run(AbstractComponent.java:240)
 at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
 at org.olat.core.gui.components.AbstractComponent.fireEvent(AbstractComponent.java:238)
 at org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer.fireValidation(FormWrapperContainer.java:119)
 at org.olat.core.gui.components.form.flexible.impl.Form.submit(Form.java:441)
 at org.olat.core.gui.components.form.flexible.impl.Form.submit(Form.java:428)
 at org.olat.core.gui.components.form.flexible.impl.elements.FormSubmit.dispatchFormRequest(FormSubmit.java:71)
 at org.olat.core.gui.components.form.flexible.impl.FormItemImpl.doDispatchFormRequest(FormItemImpl.java:561)
 at org.olat.core.gui.components.form.flexible.impl.Form.evalFormRequest(Form.java:296)
 at org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer.doDispatchRequest(FormWrapperContainer.java:100)
 at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
 at org.olat.core.gui.components.Window.doDispatchToComponent(Window.java:1201)
 at org.olat.core.gui.components.Window.dispatchRequest(Window.java:398)
 at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:282)
 at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193
 at org.olat.dispatcher.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:263)
 at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:184)
 at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:269)
 at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:216)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
 at org.olat.core.servlets.OpenOLATServlet.service(OpenOLATServlet.java:160)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
 at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
 at org.olat.core.servlets.HeadersFilter.doFilter(HeadersFilter.java:95)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
 at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
 at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:479)
 at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
 at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
 at org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor.doRun(Nio2Endpoint.java:1699)
 at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
 at org.apache.tomcat.util.net.AbstractEndpoint.processSocket(AbstractEndpoint.java:1050)
 at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$4.completed(Nio2Endpoint.java:630)
 at org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$4.completed(Nio2Endpoint.java:608)