/mcpAssociate users with a class of service that offers a license to use an IMAP client to access voice messages. For more information, see the Enabling IMAP Client Access to Voice Messages for Users section. 5. Configure SMTP proxy addresses for VPIM contacts who may receive messages from IMAP clients. For more information, see the Configuring SMTP Proxy Addresses for Contacts section. 6. If you configured Transport Layer Security to be required or optional in the procedure in Task 7.: Configure the Unity Connection server to provide a secure IMAP Unity Connection, as described in the “Securing Cisco Unity Connection Administration, Cisco PCA, Cisco Unity Connection SRSV, and IMAP Email Client Access to Cisco Unity Connection” section in the “Using SSL to Secure Client/ Server Connections in Cisco Unity Connection” chapter of the Security Guide for Cisco Unity Connection, Release 15, available at https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/15/security/b_15cucsecx.html. 7. Configure Unity Connection to allow SMTP connections from IMAP clients. For more information. see the Configuring IMAP Client Access and Authentication section. 8. (optional) If you want to customize SMTP settings, do the steps as mentioned in the Configuring SMTP Message Parameters section. 9. Configure a supported IMAP client to access the SMTP messages in the user mailbox. For more information, see the “Configuring an Email Account to Access Cisco Unity Connection Voice Messages” chapter of the User Workstation Setup Guide for Cisco Unity Connection, Release 15 available at https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/15/user_setup/guide/b_15cucuwsx.html. Configuring Unity Connection to Relay Messages to a Smart Host Step 1 In Cisco Unity Connection Administration, expand System Settings> SMTP Configuration and select Smart Host. Step 2 In the Smart Host page, in the Smart Host field, enter the IP address or fully qualified domain name of the SMTP smart host server and select Save. (For more information on each field, see Help> This Page). The Smart Host can contain up to 50 characters. Note Configuring Message Relay Settings Step 1 In Cisco Unity Connection Administration, expand System Settings> Advanced and select Messaging. Step 2 Configure message relay settings (For information on each field, see Help> This Page): a) To mark the relay messages private, check the Allow Relaying of Private Messages check box. b) To mark the relay messages secure, check the Allow Relaying of Secure Messages check box and select Save. Unity Connection sends an NDR to the message sender when it receives a message that it cannot relay because the message is marked private or secure. Note System Administration Guide 142 Messaging Configuring Unity Connection to Relay Messages to a Smart Host