Sender Policy Framework

[gemini181]

This project protects your domain from being accused of spamming:

http://www.openspf.org/

'SPF fights return-path address forgery and makes it easier to identify spoofs.
Domain owners identify sending mail servers in DNS.
SMTP receivers verify the envelope sender address against this information, and can distinguish authentic messages from forgeries before any message data is transmitted.'

I have not used it yet, but probably will.
MGH

[boyvnca]

i will try it how it work