RE: SPF ignore mail clients connecting with SMTP auth

[a . smith]

Hi Giampaolo,

  thanks for the info. Im not an expert on MTAs or SpamAssassin so Im  
trying to understand your mail.
So is it the case according to what you´ve said below that with your  
modified logic that setting your MX servers as trusted and MSA will no  
longer result in all mail being trusted? And will that then trust mail  
recieved via SMTP Auth and therefore solve my problem?

Also how does SpamAssassin identify mails as being delivered using  
SMTP Authentication? Does it rely on the MTA updating the header  
appropriately? I found in my Exim config this line which I think is  
doing something like this:

${if def:authenticated_id {\n\tauth-from $authenticated_id}}

thanks for your help, Andy.