1.0 1.1 Application Tag Library http://struts.apache.org/taglibs/struts-mailreader-1.2.1 This tag library contains functionality specific to the Struts MailReader Application. checkLogon org.apache.commons.chain.mailreader.CheckLogonTag empty Validate that there is a currently logged on user, by checking for the existence of a certain session-scope bean. If there is no such bean, forward control to the logon form.