Re: Why would anyone tolerate this?
If you have your own mail server, post process the maildir, find to get all files in the last x minutes, grep and awk, pull the from domain, Whois (yep it still works), get registration date and sed the header to add [SPAM], then let your grep “[SPAM]” * | cages mv /foo/bar/user/maildir/cur/spam or somthing of that ilk...