MailScanner to crash several times

[Jan Agermose]

hi
one of our mailscanners has started behaving very strange. its processing no emails anymore with succes only saying for each mail in the queue

Sep 20 14:38:15 mx3 MailScanner[2282]: Warning: skipping message p8JHBZlF011310 as it has been attempted too many times
Sep 20 14:38:15 mx3 MailScanner[2282]: Quarantined message p8JHBZlF011310 as it caused MailScanner to crash several times
Sep 20 14:38:15 mx3 MailScanner[2282]: Saved entire message to /var/spool/MailScanner/quarantine/20110920/p8JHBZlF011310

what might be the problem - what to look for? 

MailScanner --lint reports no problems