Yes you can run the daily report at any time via command line.
First, you must have an email address set in the Daily Report Address field in Queue Manager's General Options.
Here are the command line switches for SMTP32.exe
-qr = Queue Run
-daily = run daily report
-d = qr
<path the q file> = delivers the message specified in Q file
So to run the daily report from command line.
Open a command prompt in the IMail install directory
type SMTP32 -daily
Hit the enter key
For example, with IMail installed on C:\IMail