Each member of the post office is assigned to a message database (msgnnn.db) where the body portions of messages are stored. Many users in a post office share a single message database. There can be as many as 255 message databases in the post office (numbered from 0 to 254). Message databases are stored in the ofmsg directory in the post office.
Outgoing messages from local senders are stored in the message database assigned to each sender. Incoming messages from users in other post offices are stored in the message database with the same name as the message database assigned to the sender in his or her own post office. In each case, only one copy of the message is stored in the post office, no matter how many members of the post office it is addressed to.
For the location of message databases in the post office, see GroupWise 2012 Troubleshooting 3: Message Flow and Directory Structure. For more post office information, see Section 35.3, Information Stored in the Post Office.