com.atlassian.jira.plugins.mail.MailUtility
com.atlassian.jira.plugins.mail.MessageHandlerModuleDescriptorFactory#com.atlassian.plugin.osgi.external.ListableModuleDescriptorFactory
com.atlassian.jira.plugins.mail.internal.DefaultLoopDetectionDao
com.atlassian.jira.plugins.mail.internal.DefaultMailLoopDetectionService
com.atlassian.jira.plugins.mail.internal.DefaultMessageHandlerFactory
com.atlassian.jira.plugins.mail.upgrade.UpgradeTask_1_MoveMailHandlers
com.atlassian.jira.plugins.mail.upgrade.UpgradeTask_2_SwitchToUserKeys
