Monitoring usage of mail accounts

[WebServer]

Hello

Does anyone know if it's possible to monitor the usage of email addresses. The possibility to see the number of mails sent/received per address and afterwards aggregated per domain would seem very useful to me.

For example, sometimes I'd like to remove redirects which should not be required anymore; I do not know however if the user is still receiving (a lot of) mail on that address.

If something like this does not exist, is it possible to hook up in Plesk some code to create custom code?

thanks!