Getting mail.box from Domino server

Domino allows to setup up to 10 mail boxes for 1 server. By default it 1 mail box with name mail.box however if you increase number of mail boxes to 2 and more Domino will create mail1.box, mail2.box ... and you must remember about it.

In order to get mail box without doing lookup to ServerConfig document, just try to initiate mail1.box first and if it does not exists go for mail.box

public Database getMailBox(Session session) throws NotesException{
 String server = session.getServerName();
 Database mailbox = session.getDatabase(server, "mail1.box");
 if (!mailbox.isOpen()) {
  mailbox = session.getDatabase(server, "mail.box");
 }
 return mailbox;
}

There is topic on how to force Domino to use mail.box when multiple mail.boxes are enabled