I have been using effective system of using unique aliases for each institution that we interact by e-mail
firstname.lastname@example.org and it works great and I can see who the offenders are. (1. denotes specific user)
But there is few, that are very persistent and just sends out SPAM all the time to those specific “Aliases” from all sort of domains designated to sent spam …
Is there any effective way to “BLOCK” this specific “Aliases” “1.yyymmdd.naugtyLTD@my.box” populating my SPAM folder and being “REFUSED” or “BLOCKED” complete getting through but let all the others still be delivered?