[exim] Log selector

Dear Exim Users,

I want to customize my exim log to log only errors from outgoing mails.
Like this:

> 2012-06-29 00:42:56 1SkTyp-0008Hx-S6 ** abxyyaakkznmzzzz@??? F=<
> mail@???> P=<mail@???> R=lookuphost T=remote_smtp: SMTP
> error from remote mail server after end of data: host mta.net[11.22.33.44]: 554 delivery error: dd This user doesn't have an account (
> abxyyaakkznmzzzz@???).
>
Or:

> 2012-06-28 20:03:12 1SkPc5-0006Zl-V1 == mail@??? R=lookuphost
> T=remote_smtp defer (-46): SMTP error from remote mail server after end of
> data: host mta.net [11.22.33.44]: 451 mta.com Resources temporarily
> unavailable. Please try again later.
>
I mean all the '**' and '==' of outgoing emails with T=*remote_smtp and it
looks like 2 examples above.
I've looked into log_selector but I don't know how to configure to achieve
that.
Please help me.
Thank you so much!