What happens when two Pine sessions access the same mailbox at the same time?
This varies depending on what format your folders are stored in. With the default Berkeley format, the last session to open a folder will get full access to the folder and the previous session(s) will be changed to read-only access. When a folder is read-only, you will not see any further updates to that folder until it is reopened with full access. Currently the INBOX cannot be reopened without exiting and restarting Pine. With other mailbox formats, such as the generally recommended mbx format, any number of sessions can simultaneously have full access to a folder, with the exception that expunging is disabled.
