I run 1.2 myself but I have a friend who runs 1.3.1 as per Bill's toaster and I've seen the following occur.
@4000000046d3e54e1e4b8bec simscan:[7967]:CLEAN (14.30/15.00):2.4215s:Want it longer:58.252.179.83:Choi8Gates@computereng.com:taraq@stjoebay.com:CHKUSER rejected rcpt: from <info@sunsetcoastalgrill.com::> remote <ht7:unknown:192.168.1.71> rcpt <bobbie@flbeaches.net> : not existing recipient
I believe that should be two separate lines, not one long line with simscan and chkuser blended together.
Regards,
Rick