On 8/12/2008, CJ Keist (cj.keist@colostate.edu) wrote:
I understand what you are saying in trying to keep a vicious cycle of auto-replies responding to each other. But in our environment I don't have any choice as our central virus/spam email gateway will can any message without a valid from address in the headers. I will forward this on to our central IT guys that maintain the email gateway, but I don't hold much hope that they will listen ;) .
My advice? Throw away the gateway and find one that works correctly.
Doing this results in your users NOT getting 99.99% of valid/legitimate DSN notifications (since they all use the NULL sender, as prescribed by the RFCs).
Blocking all messages with a NULL sender is not only violating the RFCs, and will possibly result in your getting on certain blacklists, like dsn.rfc-ignorant.org, it is lazy and dumb.
But, to each his own...
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Best regards,
Charles