block all incoming emails besides whitelisted for specific email account

I have 1 email account for placing orders with a vendor only. i whitelisted that vendors email domain under spamfilter whitelist.
lately i am getting alot of spam in this email inbox.
how can i block every email besides what i whitelisted for this user account?

 

With a custom mail filter recipe like that:

Code:

if allof(
    not address :is "From" "[email protected]",
    not address :is "From" "[email protected]"
) {
    fileinto "Junk";
}

 

thank you. can the whitelist be just the domain or it must be the full email to work?
also instead of going into junk the rest of the emails, can it be rejected?

 

Code:

if address :domain :is "from" "example.com" {
    fileinto "INBOX";
} else {
    reject "";
    stop;
}

 

nice, thank you!