MS unable to detect From address from DSN and failure notice emails

[Matt Hampton]

> 
> This got marked as spam, and the From field is never logged. Any ideas?
> 
> postfix-2.2.11
> p5-Mail-SpamAssassin-3.1.3
> MailScanner-4.54.6
> 

The From field that gets as far as MailWatch is from the Envelope and
not from the message headers.

The envelope will be from "<>" (the Null sender) and therefore there is
nothing for MW to log.

matt