Cannot read header

[Chris Conn]

Hello,

What can these messages represent?  I have this occasionally when
customers send attachments with messages:

Mar  2 06:36:59  MailScanner[18007]: Cannot parse
/var/spool/MailScanner/incoming/18007/i22Bav6Q016452.header and ,
Mar  2 06:48:35  MailScanner[18123]: Cannot parse
/var/spool/MailScanner/incoming/18123/i22BmW6Q018078.header and ,
Mar  2 06:52:50  MailScanner[17930]: Cannot parse
/var/spool/MailScanner/incoming/17930/i22Bqj6Q018717.header and ,
Mar  2 08:00:54  MailScanner[23072]: Cannot parse
/var/spool/MailScanner/incoming/23072/i22D0h6R031169.header and ,
Mar  2 08:33:23  MailScanner[23190]: Cannot parse
/var/spool/MailScanner/incoming/23190/i22DXG6Q006004.header and ,
Mar  2 11:13:17  MailScanner[23025]: Cannot parse
/var/spool/MailScanner/incoming/23025/i22GD7rx016954.header and ,
Mar  2 11:43:37  MailScanner[17798]: Cannot parse
/var/spool/MailScanner/incoming/17798/i22GhVrx026313.header and ,
Mar  2 11:46:55  MailScanner[18487]: Cannot parse
/var/spool/MailScanner/incoming/18487/i22Gimrx026692.header and ,

The messages are delivered with the virus warning and no attachments.
Attachment sizes vary from small to large.

I am running MailScanner-4.25-14 on RH9, and the
/var/spool/MailScanner/incoming/ is on a tmpfs directory in case that
matters.

Thanks in advance,

Chris