Configuring SMTP logging

Every time an SMTP message can’t be delivered something like the following gets logged:

03/24/2003 13:33:33 Router: Failed to connect to SMTP host REPLY.THISFREESTUFF-MAIL.COM because The server is not responding. The server may be down or you may be experiencing network problems. Contact your system administrator if this problem persists.

All I want to see is something like this:

03/24/2003 13:33:33 Router: REPLY.THISFREESTUFF-MAIL.COM not responding.

Can I do that?

Thanks,

Charles