Knowing the mailbox name that exceeds the "outgoing email spam"
It will be better if plesk Outgoing Mail Control shows email instead of domain name.
When spam is sent through a mailbox, that mailbox is shown on the "outgoing mail" configuration page with its limit and the number of mails that exceeded the limit. When spam is not sent through a specific mailbox (without SMTP login for example through a script, the webserver) than there is no specific mailbox that can be identified.
Looking forward for this ideal feature :)