At this point you will be prompted for the Low Disk Space Watermark. This allows you to set a minimum disk space limit. If you ever run below the amount of free disk space specified, SLmail will no longer accept incoming messages and thus keep itself from using all available disk space on the system. Instead, it will send a (non fatal, 400 level) error back to the sending server or client stating that they should try to send the message at a leter time.
Note: Do NOT set this to 0% as this will allow SLmail to continue to use all available disk space.
SLmail Installation Watermark dialog box
Enter the percentage for your watermark and then click Next .