Secure POP3 and IMPAP4


If your organization’s clients work with POP3 or IMAP4 services dealing with Microsoft Exchange 2003\2007\2010, its recommended to secure the communication and authentication methods using SSL as follows:

1.Connect to IIS manager and on the ‘secure communication tab’ mark the > ‘require secure channel (SSL)’ and the ‘require 128 bit encryption’ checkboxes.
2.On the exchange manager < go to ‘server configuration’ < go to ‘client access'< go to ‘ IMAP properties’ <select the POP3 or IMAP4 tab(one by one) <go to   ‘authentication’ tab < mark the ‘secure logon. A TLS connection is required for the client to authenticate to the server’ checkbox.