This is most noticeable when opening Outlook, when large folders are accessed for the first time, when using Outlook 2003's Search folders, or when accessing the Journal folder. Users with large mailboxes may experience reduced performance using MDaemon Connector in comparison to using an IMAP or POP3 account.The MDaemon Connector Outlook plug-in requires Windows 7 or newer and Outlook 2010 or newer to function properly.