How to send email automatically after download completed?
You may be able to do it with the virus scan option, but I’ve never tried.
How?
That depends on your email program, bitcomet can execute applications when a task completes, but you need to tell it what to execute. You’d probably need to write a script to send the email.
You would need a tool like unix sendmail, a command-line tool that accepts the needed paramters, probably from a named file. It must be a command-line tool.
You would have BitComet execute that tool instead of the antivirus scan after the end of every download. You could not limit it to some downloads but not others, it will have to be all or none.
If the above doesn’t make sense to you, you won’t be able to do this without a lot more skull sweat. Nobody’s going to teach you sendmail, you’ll need to teach yourself.