[exim] greylisting question

Hi Everyone,

I have a question about how grey-listing handles multiple rcpt's (to a
single address) -

eg (SMTP transaction)
helo me.me
...
mail from: me@???
....
rcpt to: userx@???
rcpt to: usery@???
rcpt to: userxy@???

If the MTA (using greylisting) returns a 4xx message to the first user,
will the sending smtp server stop there (and re-try later) or will it
also try usery and userxy .... (etc,etc?). If it stops at the first
4xxx then with multiple recepients the delay could be days :(

Thoughts?

Cheers,
Andrew.