Strange error log message from qmail-send

["Q L.D." <qld@xxxxxxxxxxxx>]

Hi!

Today I got some strange error message in qmail-send log:

@40000000413e4445231043d4 warning: internal error: delivery report out 
of range


I have never seen this error before, so I'm not sure what does it mean?


This error occured short time after I changed "ldapserver" configuration 
file to include second (redundant) LDAP server information. Actually I 
also noticed something in qmail behaviour - when primary LDAP server 
goes down, it seems that it takes quite some time for qmail to "notice" 
that primary is down and establish connection to secondary. Is this normal?


Thanks!