The GroupWise Post Office Agent (POA) delivers messages to users' mailboxes, connects users to their post offices in client/server access mode, updates post office databases, indexes messages and documents, and performs other post office-related tasks.You must run at least one POA for each post office.
The following sections help you understand the various functions of the POA:
Using client/server access mode, the GroupWise client maintains one or more TCP/IP connections with the POA and does not access the post office directly. Consequently, the performance of the POA in responding to requests from the GroupWise client directly affects the GroupWise client's responsiveness to users. To provide the highest responsiveness to client users, you can configure a POA just to handle client/server processing. See Configuring a Dedicated Client/Server POA.
When using client/server access mode, the GroupWise client can be configured to control how much time it spends actually connected to the POA.
NOTE: Remote mode is not currently available in the Cross-Platform client.
For more information about the client modes available with client/server access mode, see "Using Caching Mode" and "Using Remote Mode" in the GroupWise 6.5 Windows Client User Guide and "Using Caching Mode" in the GroupWise 6.5 Cross-Platform Client User Guide.
Client/server access mode also allows users to access their GroupWise mailboxes from POP and IMAP clients, in addition to the GroupWise client. See Supporting IMAP Clients.
In client/server mode, the POA can provide and, if necessary, force secure SSL connections with all clients. See Enhancing Post Office Security with SSL Connections to the POA.
Messages from users in other post offices arrive in the local post office in the form of message files deposited in the POA input queue. See Agent Input/Output Queues in the Post Office.
The POA picks up the message files and updates all user and message databases to deliver incoming messages in the local post office. To provide timely delivery for a large volume of incoming messages, you can configure a POA just to handle message file processing. See Configuring a Dedicated Message File Processing POA.
In addition to client/server processing (interacting with client users) and message file processing (delivering messages), the POA: