What about add email aliases into KPM?
How it works : in KPM should be available create email alias (will be generated random email). This will be fake email or temporarily email. If i want register on website which will be spamming a lot then i use email alias rather than my real email. Email aliases = less spam. If i will receive a lot of spam via my email alias simply there will be option for blok emails from this alias and delete alias. And should be create new.
All emails from alias mail will be forwarded to the real email. But sender don´t know about this, he/she see only alias mail.
Email aliases can be created more than one or also can be deleted and created new one.