Invalid Header

[Vernon A. Fort]

My setup is FC3 with postfix + cyrus-2.2.10-3.  I had several messages 
in the queue stating "Invalid header".  After searching for hours, I 
attempted to save the message using postcat
so I could see what part of the header was invalid.  There was/is a line:

    Message-ID:

with nothing after the line.  I removed the line and re-sent the message 
successfully.  Why would single line called Message-ID: cause lmtpd 
message header errors?

Please point me to some RFC or documentation.  I need to present to the 
higher-UPS a decent explanation on why this message took 6 hours to get 
delivered.

Vernon
---
Cyrus Home Page: http://asg.web.cmu.edu/cyrus
Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html