Incoming mail messages collected by other means (e.g. an external POP3 program) may be registered by calling RexxMail with the '/register' switch. Registering involves setting the extended attributes and icon of a mail file to reflect its status as an incoming and unread message, moveing the file to the 'In' folder, and rewriting the message file object's title to reflect its contents.
Note that the contents of incoming mail message files are always left unchanged, even after viewing them. All RexxMail has to do is to change each message file's EAs and icon to reflect its status.
The warning beeps and the warning icon can be suppressed by changing the relevant entries in the 'settings.txt' file.